1998 L31 Specs

engine parts engine refresh kits exhaust gaskets. 24502586 Hydraulic Roller (LT4 Hot Cam) This hydraulic roller cam is for service only for all V8 engines with roller camshafts. Ranging in marine power ratings from 260hp for the 305, 300hp for the 350 and 340hp for the 377. Engine Capacity/Filter Oil Change Intervals; Silverado Classic 4. Research the 1996 Chevrolet 1500 online at cars. Converter is very drivable considering its specs. Kootenays Used Vehicle Network has 10,699 members. CRATEENGINEDEPOT. 7L L31 is the premier industrial workhorse, providing the power needed to get the job done without sacrificing fuel efficiency or durability. Find out what they're like to drive, and what problems they have. This L31 engine is an identical copy of what was used in the early 1950s. Page 4 of 10. Bearings-spherical plain in corrosion resisting steel without assembly slot. 95 BIG BLOCK Filter by. Dunno why your Tahoe wouldn't be the same. 5 Rocker Ratio) 2) Intake Lift =. This guide is accurate and is updated on a daily basis. GM/CHEVROLET HORSEPOWER AND TORQUE CURVES If you study the performance curves below you will see two major benefits of GearSplitting. Web History; Shopping : Advertising Programs Business Solutions About Google. Find ATK High Performance GM 350 Vortec 350 HP Stage 1 Long Block Crate Engines HP32 and get Free Shipping on Orders Over $99 at Summit Racing! Give your car or truck a little more punch with ATK High Performance GM 350 Vortec 350 hp Stage 1 long block crate engines. As Busted knuckles said the only difference I see in the GM parts listing is that it specifies 4-bolt main for the 2500-3500 trucks part#12530283. Replace your 2. 0012 in Stroke 88. JEGS 513002 Intake Manifold Small Block Chevy with 1996-Up Vortec L31 Cast Iron. Flex-a-lite invented the Flex Fan and holds the patent for the first electric fan for the automotive aftermarket. New Stand Alone Engine Wiring Harnesses. 4) in 1998, the model with 4-door sedan body and V-6 2987 cm3 / 182. 0L - 305 V8. Crane Cams is the original leader in performance camshafts for street and race engines. 22lbs, 44lbs and then 66lbs. FREE Shipping. 7 engine out of a 98' K1500. Procedure: 1. GM Engine Information (Looking for Transmission info? Click here) This page has been set up to bring you the most accurate and up to date information on GM engines that is available to us. Depending on the year, make and model of a car, horsepower ranges from approximately 145 to more than 370. How to Find the Best New Car Incentives and Rebates 2020 Kia Telluride vs. 95 Sale price $71. COMP Cams® Pro Magnum™ Hydraulic Roller Lifters Increase Performance Of GM Vortec 350 & GM LT1: Join our mailing list----- news update -----Pro Magnum™ Hydraulic Roller Lifters and Installation Kit provide the ultimate in hydraulic roller performance and durability COMP Cams® Pro Magnum™ Hydraulic Roller Lifters feature state-of-the-art technology, making them the best choice when. Requires GT5 4. This can cause a rough running engine or stalling condition, the Check Engine Light may or may not illuminate. Here's a list of Chevy V-8 crankshaft journal sizes. COBB approaches design by taking the entire vehicle-platform into account as a complete system. The Chevrolet Performance Truck 350ci L31-R Long Block Assembly was designed as a direct replacement for 1996-2000 GM full-size trucks and 1996 -2002 full-size vans. The LS1 engine is the newer design that replaced the older LT1 engines. 7 Vortec that is pretty much stock. GM/CHEVROLET HORSEPOWER AND TORQUE CURVES If you study the performance curves below you will see two major benefits of GearSplitting. 1998 Chevrolet C K 3500 Crew Cab Base 4dr 168. Allied Motor Parts sells 96-02 Chevy 350 5. Your Chevy's timing specifications are located on the vehicle emissions control information label under the hood. 7 engine out of a 98' K1500. (oil, unless noted). All journal sizes are given in "STANDARD" sizes. Summit Racing - FAST. 2 bolt main. i have a chevy 350 5. 0:1 compression, although later HQ got the leaner idle 704 Quadrajet. Engine, horsepower, torque, dimensions and mechanical details for the 1970 Oldsmobile 442. Read 1998 Chevrolet Silverado reviews from real owners. 1998 - 2002 Vortec with T-56 6 speed manual transmission, or with a cable throttle body up to 2006. chevy 350 96-2000 comp engine 96-2000. ) If you are using a stock type coil and cannot find these specs, 2. This tractor runs and drives but you cannot steer it the steering is stripped. See body style, engine info and more specs. that is a pretty universal spec. The intake design of the 4. 7 vortec Sep 27 2011, 4:42pm I have a 98 Silverado and the previous owner told me he switched out the 5. Performance Specifications The Vortec generated 255 horsepower at 4,600 rpm and 330 foot-pounds of torque at 2,800 rpm, or the force required to move a vehicle forward. Below is the pinouts for the ecm #'s 1226870 (1985 only. Thing is I am taking the L31 tune one step farther, L29. Learn more about the 1996 Chevrolet C/K Vortec V-8 Pace Truck - Article. all factory L31's that I'm aware of from 1996-2001 were rated at 255hp/330ftlbs. We strive to help you get the information you need about PCD, offset, rims and all other wheel and tire data that you need for your vehicle. You want more horsepower on 1998 5. That means an option available from GM when the truck was new. Current Listings On. Depending on small factors (air temp, fuel quality etc) these will vary, but those are the numbers +/- 5hp depending on the day of the week. Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 1998- Chevrolet Silverado. It has an adjustable. Choose the desired trim / style from the dropdown list to see the corresponding specs. I actually went through several lists and made some corrections before making this list. Missing Entry: Corvette Z06, vin code S 5. Just fix your car. Intake manifolds constructed from cast aluminum, polymer, or fabricated from sheet aluminum. Performance SpecificationsThe Vortec generated 255 horsepower at 4,600 rpm and 330 foot-pounds of torque at. The other version was the traditional three angle valve grind. 6 rockers on my late model 350 and thought about that as i was doing it. I have this cam for my "planned" 406TBIslipping a 406 (already converted to oem roller) under my 5. Mounts engine at original SB V8 position. Improve the performance of your Vortec by installing our high dwell Dyna-Module! Dwell within the module controls a coils saturation time, which is the time needed by the coil to produce a spark. 7 motor with roller lifters. Chevrolet Performance’s HT383E crate engine is an affordable and more powerful direct replacement for the tired 350 engine in your 1996-99 full-size GM truck or SUV. Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 1998- Chevrolet Silverado. Installed Vortec heads on a standard 1986 reman 5. First off, this is for a truck. Small block chevy head castings; Casting # Combustion Chamber size CCs Intake valve Exhaust valve Production Years Misc Engine; 10033867: 62cc: 2. 2L (I4) all the way up to 8. The 2002-2006 Altima (L31) uses a new drum-in-disk type rear parking brake. 1996-2002 GM OEM Part # 12681432 - Gm Engines 12681432 - Vortec 350 L31 New Crate Engine. The BoxWrench Engine Specs Database is a community resource for mechanics of all skill levels to access a reference library of Firing Orders, Distributor Rotation Directions and Block-Cylinder Numbering as well as Torque Specs, Timing Settings and Cylinder Head Tightening Sequences among other engine specs. The huge V8 power was the last of its 350 engine design. REMOVAL & INSTALLATION 4. M30 Specs The M30 transmission has an aluminum case and weighs 162 pounds with all the fluid in it. The new specs for the Vortec versions of the 5. The "MARINE" intake is a potential upgrade for L31 trucks. 5 ms dwell time is usually a safe number. CHEVYTHUNDER. It is part of GM's Gen III Small Block engine. First off, this is for a truck. 5" Flange: 7/16" Gauge: 1. 7 vortec engine, what are the torque specs for the connecting rod bearings and for the mian cap bearings. Vortec is a trademarked name for a line of small block engines for General Motors trucks. All per this thread, and this thread. The LS1 and LT1 are two GM engines that are very popular among enthusiasts. Only at www. The engine idles very rough and you can definitely tell it's a misfire from the exhaust end. The 94-97 LT1 and LT4 intake manifolds appear the same from above, all LT4 intakes are powder coated red from factory, but the difference is in the intake ports. The late 2000s blocks that are available are based on the L31 platform. The hour meter is showing 632hrs. It has 220,000 miles and runs great every day of the week for a short commute. 3 V6 (2002 – 2006) LU3 Vortec: 4. I have an older 350 block and crank and thought about building this motor and having it ready too switch the vortec heads,intake. 7 rocker arm torque? or adjust? Suburban Car Forums. New pump, filter. Summit Racing - FAST. General Motors placed the 5. Find CHEVROLET 5. ) NF E27-701-1984 (Structural bolts and nuts intented for use in steel structures. ©2000-2016 - TractorData™. Trans Order Code: MW3. 1996 4wd 1500 L31 350 Vortec with a 1995 Camaro 5. We offer disc brake conversion kits that allow you to use late model F-Body (1998-2002 Camaro & Firebird) 12” front and rear disc brakes on early muscle cars with GM 2-piece spindles. 7 l parts cadillac 472 500 oil pump drive shaft-oem specs-chp-ep55. What is the lift on a factory cam for an oe 350 vortec for 98 gmc sierra 5. Small Block Chevy Cylinder Heads: As you may already be aware, there are is a dizzying number of cylinder heads available for the Chevrolet smallblock. but see if you can get a spec from an fsm first. I spent a day replacing the oil pump with a new one and then put in new main bearings. Cam lobe is a critical part of the valve train operation an. Page 2 of 3: How to Test the 'Spider' Fuel Injector Assembly (4. The late 2000s blocks that are available are based on the L31 platform. Research the 1996 Chevrolet 1500 online at cars. Unlike most LS swap parts on the market this kit replaces the frame brackets in addition to the mounts so you'll have clean mounting of your engine and not a mix of parts that are weak and don't work together properly. Depending on the year, make and model of a car, horsepower ranges from approximately 145 to more than 370. I thought we were talking about a 5. Schematics and pin-outs for 1998 & 1999 Vortec 5. Technical specifications. Once dry, lightly sand the primed Volkswagen paint area with #220 grit sandpaper followed by #600 wet and dry sandpaper. The information listed here is for the stock engine. 2L V8 Small Block LS3 - including detailed info and specifications, vehicle applications, and more. I'd like to take a minute to offer the very highest praise for Engine & Transmission World. Known as the GEN 1+, this was the final incarnation of the 1955-vintage small block, ending production in 2005 with the last vehicle being a Kodiak/Topkick HD truck. 00 inches and a stroke of 3. GM Port Injection. 7 GMC truck (carryover from 1998, it's a Sierra Classic). ) NF L22-443-2000. 2l 6-cyl -vin [c] 4. The 2002-2006 Altima (L31) uses a new drum-in-disk type rear parking brake. The engine was used in the Corvette from 1997 through 2004. The Car Connection Engine Order Code L31. 5 Rocker Ratio) I do not have duration or centerline specs, though I am sure htey are mild. Also if you read the special note above, you'll know that injector pin assignment changed from 1997 to 1998 for cylinder 1 & 8 on a V8, and 1 & 6 on a V6. 7 Liter Vortec Remanufactured Engine you have been looking for! Accurate Engines is an industry leading remanufacturer of the Chevy 5. Motor Trend reviews the 1998 Chevrolet K2500 where consumers can find detailed information on specs, fuel economy, transmission and safety. 10 Axle Ratio with L31 5. Marine intake right/stock L30-305/L31-350 truck/van intake, and left is GM/Mercruiser crossram marine intake. I would like to know the camshaft specs for the 295hp Vortec 350 marine engine , the 1 with the marine intake. 3 L 5300 LM7. I torqued the head bolts 3 times and in the sequence the manual said to. Explore the specs of the Four Winds Class C RV by Thor Motor Coach. Many of the people reading this right now own f-body Camaros, and want to know if they should mod their LT1, or swap in an LS1. 7, does it have hydraulic lifters? im thinking of putting a new cam, bearings, and lifters and need to know what lift is on an oe cam for this engine and what kind of lifters is in it?. specifications are shown in foot-pounds in bold type. 3 L V6 that used "vortex technology" to create a vortex inside the combustion chamber, creating a better air/fuel atomization. com for torque specs but they have nothing on these valves, and i have read different opinions on the torque or adjustments, but i havn't found one with a '99 5. Electrically very similar, but some significant wiring differences (injectors mainly, no spider injection in a L29). Installed Vortec heads on a standard 1986 reman 5. 0012 in Stroke 88. We offer a wide variety of downloadable information, such as wiring schematics and service manuals for various chassis manufacturers. Navara (D22) Accelerator Control System Auto Cruise Control System. For those who may be new to the game, the Vortec head was first introduced on the L31 350ci truck engines in 1996. Fits: 1996 and up GM 5. High Performance Valve Spring Kit for SBC LT1 w/ Aluminum Heads, 135 Lbs Seat. You can find a list of RPO's here. 3 L V6 that used "vortex technology" to create a vortex inside the combustion chamber, creating a better air/fuel atomization. ATK HP74 Chevy 350 Vortec Base Engine 315HP, Call 866-721-2315 to Speak with an ATK Crate Engine Specialist www. Re: Lashing the valves on '99 350 vortec I just put 1. Easy to use parts catalog. Vortec is a trademarked name for a line of small block engines for General Motors trucks. M30 Specs The M30 transmission has an aluminum case and weighs 162 pounds with all the fluid in it. 1998-2001 escalade l31 5. Messicks has over 50,000 Kubota parts in our Elizabethtown warehouse. Where to Find Timing Specifications. The LM7 is a 5. Vortec L29 L30 L31 L35 ECMs do not Require CAN Termination The Vortec L29 L30 L31 L35 ECM does not communicate with CAN bus, so it can be programmed on the benchtop with a direct connection to the BenchForce™ PowerBlock using Pass-Through Harness for GM, EFI# 100-01072. ©2000-2018 - TractorData™. The configuration settings could not be read from the server. The best thing about the L31 Vortec head is the affordable price. 54 kits found for Flywheel Bolts : ARP offers two styles of Flywheel bolts: premium grade Pro Series, with a 200,000 psi rating and High Performance, with a 180,000 psi rating. At 100,000 miles my oil pressure started going down. I just did a 4. My manual only goes up to 1996. I have a 383 stroker with stock vortec heads I have heard that the valve guides have a max lift before they hit Does anyone know what the max lift is on these heads??? i have a 500 lift cam in it now and im sure it will not work but i do have a 292 cam with 488 lift. Search Car Torque Specifications by Engine or Model. 4 Larger injectors, which ones. Vortec is a trademarked name for a line of small block engines for General Motors trucks. by Mike Tomkins Preview posted 01/14/2015. Converter is very drivable considering its specs. 100" valve stems and valve springs that are. The battery is old and will need replacing as well. The Huawei P9 Lite has a fingerprint scanner on the back, and sports a 5. 7L L31 Tech Specs. Besides most Vortec's being iron block, as seen above there are some serious size differences and considerations depending on your project. We manufacture and design many of our own parts. com is Sponsored by: What are the LT1 basic specs? Block and Basics Displacement: 350 cubic inches, 5733 cubic centimeters, 5. REMOVAL & INSTALLATION 4. 6 rocker ratio (intake/exhaust) is 525/525. CFM Technologies specializes in GM Throttle Body Injection, Carburetor Spacers, and drag racing, circle track racing, and street & marine performance. I have a 1998 GMC with a 5. Heads/cam/boost or exotic swap combos will be additional $50 fee, please contact us with details. installation went great fitment was much better than expected. Call Southeast Performance for your precision built shortblock. I've got a friends '97 Silverado in my driveway with a blown head gasket, it's got the L31 Vortec engine. Huawei NMO-L22, Huawei NMO-L31. Also can't get code reader to work, what fuse powers up that circiut? Thank-you. 7 vortec extended 3dr cab rebuilding entire motor all the way to engine core ccccccan somebody help me with all the torque specs for camshaft bearings rods etc 3 Answers. 7L L31 Features & Specifications 5. The new specs for the Vortec versions of the 5. roller cam. 97 Chevy K1500 with 5. The information listed here is for the stock engine. Fits: 1996 and up GM 5. head #906or 062. 5 Rocker Ratio) I do not have duration or centerline specs, though I am sure htey are mild. If the poppet becomes contaminated or the fuel pressure is lower than specifications, the injector will not fire. Creating an extensive line of trailers spanning from 17 to 42 feet, Wildwood by Forest River was also connected to the construction of park model units starting in 2006. I have a 383 stroker with stock vortec heads I have heard that the valve guides have a max lift before they hit Does anyone know what the max lift is on these heads??? i have a 500 lift cam in it now and im sure it will not work but i do have a 292 cam with 488 lift. One of the most time consuming tasks with installing a car stereo, car radio, car speakers, car amplifier, car navigation or any mobile electronics is identifying the. The LM7 is a 5. FAST is the leading developer of electronic fuel injection systems, EFI components, intake manifolds, tuning tools for high performance and street applications. 7L L31 is the premier industrial workhorse, providing the power needed to get the job done without sacrificing fuel efficiency or durability. 3 L V6 that used "vortex technology" to create a vortex inside the combustion chamber, creating a better air/fuel atomization. You'll find local deals, specs, images, videos, consumer and expert reviews, features, trims, and articles for every turn in your 3500. Read reviews, browse our car inventory, and. 12552096 Bolt, Long style cast iron reverse turning 1996-1998 L31 Any small block engine, regardless of year, that uses Vortec heads, will require an external coolant bypass line from the intake manifold to the 5/8" hose nipple on the water pump (passenger’s side). Free Shipping! Capable of 255 horsepower, the GM Goodwrench long block 350 engine was created as a drop-in replacement for 1996-2002 Chevy/GMC 1/2-ton and 3/4-ton applications. Browse the most popular brands and models at the best prices on Machinery Pete. Specifications of the Huawei GR5 mini. 3L 236, 255 V-6 1. We carry a full line of booths and enclosures, coinless phones, armored phones, and hotel phones. 7 GMC truck (carryover from 1998, it's a Sierra Classic). Distributor is not included by can typically be reused. The cylinder heads feature combustion chambers very similar to those of the LT1 V8, but without the reverse-flow cooling. thanks - Answered by a verified GM Mechanic We use cookies to give you the best possible experience on our website. The stock combustion chambers are too large as-cast, so they need to be milled if used on a 305. GM Engine Torque Specifications and Sequences. I am preforming this Converting a L31/vortec 350 wiring harness for stand alone - Texas 4x4 Forum. Bore, Stroke and Compression Ratio In 2002 the L31 had a bore of 4. Small Block Chevy Cylinder Heads: As you may already be aware, there are is a dizzying number of cylinder heads available for the Chevrolet smallblock. It still had low oil pressure. 2L (I4) all the way up to 8. The rod bolts should continue. Cam lobe is a critical part of the valve train operation an. Mower Belt for L120 and L130 Models GX20305, belt cover designed for durability these more kevlar cords help meet high horsepower demands at The Home Depot. Engine Mechanical Specifications Specification Application Metric English General Data Engine Type V8 Displacement 5. The marine engine and the L31 truck engine have the same heads and run the exact same 60 psi of fuel pressure, what makes the marine engine need the 24 lb/hr injectors and the L31 truck engine get by with the 19 lb/hr injectors??. NOTE: This is for PROGRAMMING ONLY, if you want to purchase a custom programmed ECU outright, please email for pricing. Heads/cam/boost or exotic swap combos will be additional $50 fee, please contact us with details. 1998-2001 escalade l31 5. COM ECM PINOUTS. com for torque specs but they have nothing on these valves, and i have read different opinions on the torque or adjustments, but i havn't found one with a '99 5. Thing is I am taking the L31 tune one step farther, L29. this is an old thread, but I've never heard of a 350hp factory L31. Specifications and Circuit Description Schematic for models with fidelity change for band position. The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). Fully engage the control lever. It is the last production Generation I small-block from Chevrolet. 4 Larger injectors, which ones. i am doing head gaskets on this burban, and i always use autozone. I figured this should clear up some of the multiple posts just asking the specs. In 1996 the 305ci RPO L30 engine got different heads than were used previously. This information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle. ) NF E27-701-1984 (Structural bolts and nuts intented for use in steel structures. They both don't use CNP, they use conventional distributors. See body style, engine info and more specs. There you are shopping for an engine replacement. 7 motor with roller lifters. The kit is offered for either disc brake spindles or drum brake spindles and can be ordered with or without our machined hubs. 7 LT1 camshaft installed. Fuel is VP C12. All Nissan (North America) Altima 2nd-gen. Used Vortec 350 Engines For Sale. 5 ms dwell time is usually a safe number. This information should be used as a guide only. HAR 1013m: $679. com do the searching for you. I was curious if anyone had any pictures or a write-up on what to remove from the factory l31 harness for stand alone operation. Find local 1998 Chevrolet C3500 prices online. Fuel Type Specifications have been sourced from redbook. GM Engine Torque Specifications and Sequences. Unless you are modding the ignition. 5 Rocker Ratio) I do not have duration or centerline specs, though I am sure htey are mild. Michigan Motorsports LS1 Rocker Arms and Bolts with Trunion Kit Installed - FITS LS2 LS6 LQ4 LQ9 LY5 LY6 LM7 4. 5l 4-cyl - vin [h] 2. 1500 2dr 1500 2dr 4WD 1500 4dr 1500 4dr (CMI) 1500 4dr 4WD 1500 4dr 4WD (CMI). GS INFO & SPECS 1963 Grand Sport History 1996 Grand Sport History C6 Grand Sport Info C7 Grand Sport Info C4 Grand Sport Info LT1 vs LT4 LT4 Dyno Page 1996 GS & LT4 FAQ C6 GS FAQ GS Photo Gallery GS Vanity Tags GS Collectibles Where in the World? GSR INFO About the GSR GSR Member Benefits GSR NCM Brick Page GSR Events GSR Links GSR Sponsors. Fuel staved. The L31 was the last engine to come out of the first-generation of Chevy small blocks. As the title states i'm in the middle of swapping from the stock intake with internal poppet injectors. It stands for: M30: TRANSMISSION, AUTO 4 SPD, HMD, 4L60E, ELECTRONIC There is a different RPO code for every GM transmission, sometimes several. list of modern GM rpo codes/option codes for general motors vehicles. Heads were rolled one degree to get the chamber to 50cc from 64. some satisfied customers. 95 Sale price $71. GM Engine Information (Looking for Transmission info? Click here) This page has been set up to bring you the most accurate and up to date information on GM engines that is available to us. is added to your wish list. The restraint type is specified as character seven of the American GM VIN for passenger cars. Starting to gather parts and steam for the Vortec swap. 4 cui engine size, 141. 480 in Compression Ratio 9. com/58zd8b/ljl. CAMSHAFT SPECIFICATIONS ALL NEW castings. Only Patented and Proven Mono Drive Supercharger System with Patented Internal and External drive sytems Since 1993 -- Celebrating 24 Years of Manufacturing. All GASOLINE vehicle since 2001and DIESEL vehicle since 2004 are COMPATIBLE even if they are not in the list. 2004 - 2008 Nissan Teana [ J31 ] QR20DE 2. ©2000-2016 - TractorData™. Pace Performance offers world famous engine combinations that can't be beat!. Come to Ferman Chevrolet of Tampa to drive or buy this Chevrolet C/K 1500: 2GCEK19R3W1264057. this is an old thread, but I've never heard of a 350hp factory L31. (oil, unless noted). 1996 4wd 1500 L31 350 Vortec with a 1995 Camaro 5. A Small Block Chevy tech site with Block casting numbers, Cylinder head casting numbers and much more information. Unlike most LS swap parts on the market this kit replaces the frame brackets in addition to the mounts so you'll have clean mounting of your engine and not a mix of parts that are weak and don't work together properly. All harnesses built by Fuel Injection Specialties are configured to plug into OEM components at their stock locations. 5 ms dwell time is usually a safe number. The HT383 starts with a cast-iron block with four-bolt main caps, a forged steel crankshaft, a smooth hydraulic roller camshaft and a set of iron Vortec heads. 7 GMC truck (carryover from 1998, it's a Sierra Classic). Super Chevy features world famous magazines including Camaro Performers, Super Chevy, Corvette Fever, and Chevy Hi-Tech Performance. LS1 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More Posted by OnAllCylinders Staff on October 12, 2017 at 9:00 am The 5. Save 1998 chevy 350 engine to get e-mail alerts and updates (Fits: 1998 Chevrolet) 90 DAY PARTS ONLY WARRANTY INCLUDED L31, Each. One version had an Inconel exhaust seat with single angle valve grind and was available on 1 ton trucks. today as a guide. 3-liter LM7 engine replaced it. All that I have done to it is stick in a K & N Filter (which actually did raise my mileage by 3/4 of a gallon, to my surprise) and stick true dual exhaust on it with glass packs and tips. The new specs for the Vortec versions of the 5. No, right here right now. You may have to register before you can post: click the register link above to proceed. 1998 Chevrolet C K 3500 Crew Cab Base 4dr 168. Read 1998 Chevrolet Silverado reviews from real owners. 7L Vortec cylinder head is the best flowing production head Chevy has made for the Gen I SBC engine to date. As shown, compression height is the distance between the centerline of the pin bore and the top of the piston. I have a 1998 Chevrolet truck with a 350 vortec.