Four bolt main blocks are desirable in high … SKU 57100. The LS engine is designated 54 and this number is generally the first two numbers that define the actual cam part number. 366298...................4...Bowtie, Aluminum, billet main caps, 3.398" bore with sleeves, two piece rear main seal. 14101148 Small Block V8 1987-1990 350, 4 bolt, 1-piece rear seal. journal....3.00" stroke3876768....283.......forged..small journal....3.00" stroke3884577....327.......forged..small journal....3.25" stroke3892690....350.......forged..medium journal...3.48" stroke3911001....307,327...cast....medium journal...3.25" stroke3911011....307,327...cast....medium journal...3.25" stroke3914672....327.......forged..medium journal...3.25" stroke3923279....302.......forged..medium journal...3.00" stroke3932442..267,305,350..cast...medium journal...3.48" stroke3941174....307,327...cast....medium journal...3.25" stroke3941178....302.......forged..medium journal...3.00" stroke3941182....350.......forged..medium journal...3.48" stroke3941188....350.......forged..medium journal...3.48" stroke3949847....283..forged or cast..sm. Add to Cart. side, aluminum10106179...90......350..........LT5, ZR1, DOHC, 32-valve, drvs. side, aluminum10110810...91-up...350..........Gen. 1, 65cc chambers10120928...87-95...35010125320...94-96...350..........Gen.II LT1, cast iron version, used on "9C1" Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster reverse flow cooling 10128374...92-up...350..........Gen.II LT1, 53cc, angle plug, aluminum, reverse flow cooling, 175/68cc ports10134352........................Bowtie, 45cc, angle plug, "low" port, 223cc intake port,aluminum, 18' race head10134363........................NOTE: This casting # has been used in many different versions of this aluminum 18' and 15' Bowtie race head. Two types of crankshafts are offered, cast nodular iron and forged steel. Magnum 206/206 Hydraulic Roller Cam for Chevrolet 262/4.3L V6 . PART NUMBER 12565308 – 2002-04 LS6 CAM CARD DATA: 117.5 LDA, 120 INTAKE CENTERLINE. Quiktyme 210/210 Solid Cams Honda B16A/B17A/B18C/B18C5 V-TEC . ZL-1, Mark IV3946053....427.......97-up...4-bolt, Alum. most all after market cams are marked on one of the ends. I know that Chevy Casting Numbers are on several sites on the World Wide Web but I thought it would be a good idea to list them here too. They are notoriously very hard to read and often people make the mistake of thinking a '3' is an '8'. It's important to remember the 'to' and 'from' dates listed may vary due to production lead time and stock inventories being depleted. Wish List Compare. This drawing is of the 1967 version of the 302 cid Chevrolet. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. Advertisement. Some casting numbers are NOT listed as they may have been used in other models of the Chevrolet lineup but were NOT used in the Chevelle - such as the 1965/66/67 Chevy II blocks #3790721 and 3791362. Add to Cart. Chevy Hardcore NEWSLETTER - SIGN UP FREE! Specifications. I actually went through several lists and made some corrections before making this list. Z28 in 1969. The Chevrolet small-block engine is a series of automobile V8 engines built by the Chevrolet Division of General Motors using the same basic, and for a V8, smaller engine block. stock chevy cams sometimes have the core casting number cast into the cam core and it is usually one number off of the part number retired race engine builder,former NASCAR tech inspector. $714.99. side, aluminum10225122...95......350..........LT5, ZR1, DOHC, 32-valve, pass. The ID number will consist of either eight or nine digits; the last four numbers identify the cam and its specific application. If you are looking for the actual Chevy engine codes that are stamped into the block during assembly, Nasty Z-28.com has an excellent block stamping number decoder. "010/020" blocks. The 350 LT1 rocked. Here’s an overview: 1985: The 1174N casting came with a two-piece rear seal and a flange in the back. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. 1.70 ROCKER RATIO Lift: @Cam @Valve EXHAUST: 0.322 0.548 INTAKE: 0.324 0.551 Cam Timing@0.004-inch Tappet Lift: Open Close Adv. Category, Engine. The new format is: 14102058 Small Block V8 1987-1991 305, 2 bolt, roller cam, 1-piece rear seal COMP Cams uses two-number designations for all its engine families. 4.000 in. This means it … Here is a list of casting numbers, along with their original applications. Details for 10243880. Wish List Compare. Bore Dia. The small-block family line was honored as one of the 10 Best Engines of the 20th Century by the automotive magazine Ward’s AutoWorld. If the cam is set into the engine to produce full lift at the same number of degrees after TDC on the number-1 inlet valve as the cam’s LCA, then the cam is said to be timed straight up. Small Block Chevy Crankshafts. This number should be on your camshaft, followed by a number of degrees. Camshafts are identified by (usually) the last 4 digits of the part number and a casting symbol. Chevy engine casting numbers. That number is actually the casting number of the camshaft, not the part number. For example, if your cam lobe lift is .319 and you're using a 1.5:1 rocker arm ratio, you can take .319 x 1.5, which is .479 inches of overall valve lift. 10147898...95-98...350..........Gen.I crate motor10159550...87-95...35010159551...87-95...30510159552...87-95...35010159553...87-95...30510174389...91-94...350..........LT5, ZR1, DOHC, 32-valve, drvs. Small Block Chevrolet Factory Cam Specs by part number. Different chamber volumes, port volumes, port locations, valve sizes, etc. 10036033 Small Block V8 350, 4-bolt, Goodwrench crate engine, 2-piece rear seal, 10051182 Small Block V8 2 bolt, Bow Tie block, 3.75-4.30 bore, 1-piece rear seal, 10051184 Small Block V8 4 bolt, Bow Tie, 4.00-4.160 bore, 1-piece rear seal, 10054727 Small Block V8 1986 350, 2-bolt or 4-bolt, one piece rear seal, 10066036 Small Block V8 350, 4-bolt, Goodwrench crate engine, 2-piece rear seal, 10066038 Small Block V8 1994 350, 4-bolt, Goodwrench crate engine, 2-piece rear seal, 10090511 Small Block V8 1990 350, 2-bolt, LT5, Corvette ZR1, 375hp, 10134996 Small Block V8 4-bolt, Bow Tie, aluminum, 4.125 bore, 2.65 main journals, 10199001 Small Block V8 1993-1995 350, 4-bolt, LT5, Corvette ZR1, 405hp, 10243878 Small Block V8 1996-1997 305, 2-bolt, Vortec truck, roller cam, 1-piece rear seal, 10243880 Small Block V8 1995-1999 350, 4 bolt, crate engines and ZZ4, roller cam, one piece rear seal, Chevrolet Block Identification number locations. Specifications. Notes, 350, 4 bolt, crate engines and ZZ4, roller cam… NOTE: The Gen-II LT4 camshaft P/N 24502586 was designed to be used in many different engines. Street Outlaw’s 1,100 Horsepower ManVan Is For Sale, Building A ’69 Camaro That Stands Out In A Crowd, On Lock Down With Stage 8 Locking Fasteners, Top 10 Mistakes To Avoid Before Hitting The Dyno, Sweet Street Chevy: Jim Rivera’s Twin Turbo 1955 Chevy, Gear Up For Accurate Timing With Milodon Gear Drive Systems. A "two-bolt" main, or a four-bolt main. Typically camshaft manufacturers list this measurement by multiplying the cam lobe lift by the stock rocker arm ratio, usually 1.5:1. Late in the 1956 model year, Chevrolet changed the format of the engine plant stamp. were used. We will safeguard your e-mail and only send content you request. If you notice any mistakes or have any additions, use my contact me form and let me know so I can update the list. Blocks were made for each crank main journal size. Check out this quick reference of Chevy V8 block-casting numbers. Drawings by David Kimble.Production of the original small-block began in the fall of 1954, for the 1955 model year, with a displacement of 265 cid, growing incrementally over time until reaching 400 cid in 1970. Those in the know remember the original 350 cubic-inch LT1 introduced in 1970 was a real powerhouse with a hot mechanical cam and 370 horsepower on tap from the factory. Displacement: 6.0L / 364 cid. Do not enter the -2 on dual cams part numbers or the (I) that indicates intake or (E) for exhaust. Example: 63402A-2 enter 63402A Taking a break from the Midwest dirt tracks to fight evil doers in the world, he completed a full 21 year career in the Marine Corps. 366299...................4...Bowtie, Aluminum, nodular iron splayed caps, wet sump, 4.00" bore389257.....302.....67....2393288.....283...65-67...2460703.....350.....78....4460776.....305...78-79...2460777.....305...78-79...2460778.....305...78-79...2 or 4, some Canadian assembled heavy duty truck blocks have 4-bolt main caps471511.....267...79-82...23556519....283...58-61...23703524....265.....55....2...No oil filter3720991....265...56-57...23731548....265...57......2...No side motor mounts3731548....283...57......2...No side motor mounts3737739....283...58-64...23756519....283...58-62...23782870....327...62-67...23789817....283...62-64...23789817....327...62-67...23789935....283...61-64...23790721....283...62-64...2...Chevy II recessed oil filter boss3790721....327...65-66...2...Chevy II recessed oil filter boss3791362....327...62-67...2...Chevy II recessed oil filter boss3792563....327.....65....23792582....283...64-65...23794226....283...58-63...23794460....327...62-64...23830944....327.....63....23834810....283...64-66...23834812....283...62-63...23837739....283...58-62...23849852....283...57-66...23849935....283...65-67...23858174....327...64-67...23858180....327...64-67...23858618....350...68-76...23862194....283...65-67...2...Chevy II recessed oil filter boss3862812....283...62-64...23892657....302.....67....2...Z-28 Camaro3892657....327.....67....23892657....350.....67....2...Camaro3896944....283...66-67...23896948....283...66-67...23903352....327.....67....23914636....307.....68....23914638....307.....68....23914653....307...68-73...23914660....327.....68....23914678....302.....68....2...Z-28 Camaro3914678....327.....68....23914678....350.....68....23931174....307.....68....2...Truck3932371....307...69-73...23932373....307...68-73...23932386....302.....69....4...Z-28 Camaro3932386....327.....69....23932386....350.....69....2 or 43932388....327.....69....23932388....350.....69....2 or 43933180....327...68-69...23951509....400...70-71...43951509....400...74-80...23951511....400...70-73...4...Some replacement blocks had 2-bolt main caps3956618....302.....69....4...Z-28 Camaro3956618....327...68-69...23956618....350.....69....2 or 43956632....307.....69....23959512....327...62-67...2...Was also used for some "CE" replacement blocks3959532....283...64......2...Used for some "CE" replacement blocks3959538....327...........2...Chevy II recessed oil filter boss, Used for some Chevy II "CE" replacement blocks3970010....302.....69....4...Z-28 Camaro3970010....327.....69....2...Trucks and industrial3970010....350...69-80...2 or 43970014....350...70-76...2 or 43970020....307...69-73...23970024....307...69-73...24715111....305.....80....26259425....350...69-76...2, 95509.....400....76...2 bolt have only seen one10036033...350...........4...Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"10046164...305.....86....210049804.................4...Aluminum, Pontiac Super Duty version of Gen.I SBC, 4.00" bore, 350 mains, 2-piece rear seal, splayed caps, GTP race block10051182.................2 or 4...Bowtie, 3.75"-4.30" bores, 1 or 2-piece rear seal10051184.................4...Bowtie, 4.00"-4.155" bores, 1 or 2-piece rear seal10054727...350...86-up...2 or 4...one piece rear seal, some "Made in Canada"10066036...350...........2 or 4...Target Master/Goodwrench crate motor, 2-piece rear, seal, "Hecho en Mexico"10066038...350.....92....4...Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"10090511...350.....90....2...LT-5, ZR1 Vette, 375hp10125327...350...92-up...2 or 4...Gen.II LT-1, reverse flow cooling10125327...350...96-up...2 or 4...Gen.II LT-4, reverse flow cooling10134398.................4...Bowtie, Aluminum, 4.125" bore, 2.65" main journals10134996.................4...Bowtie, Aluminum, 4.125" bore 2.65" main journals10153558...350...91-92...4...LT-5, ZR1 Vette, 375hp10168588...265...94-96...2...L99, Gen.II, 4.3 Liter V-8, Caprice, reverse flow cooling10199001...350...93-95...4...LT-5, ZR1 Vette, 405hp10243878...305...96-98...2...Vortec truck, roller cam, one-piece rear seal10243880...350...95-00...2 or 4...Vortec truck, Gen.I crate motors and "ZZ4", roller cam, one piece rear seal12550592...350...97-up...crossbolted block, Gen.III, "LS1", aluminum12551358.........99-up...Gen.III, 4.8L or 5.3L, cast iron, truck12551364...364...98-04...crossbolted cast iron Gen. III, 6.0L, truck12559378...350...99-up...crossbolted block, Gen.III, "LS1", aluminum12559846...350...98-up...crossbolted block, Gen.III, "LS1", aluminum12560621...350...98-up...crossbolted block, Gen.III, "LS1", aluminum12560626...350...99-up...crossbolted block, Gen.III, "LS1", aluminum12560629...350...99......crossbolted block, Gen.III, "LS1", aluminum12561168...350...01-up...crossbolted block, Gen.III, "LS1", aluminum12562174...350...98-up...crossbolted block, Gen.III, "LS1", aluminum12568952...364...05-up...crossbolted block, Gen.III, 6.0L, aluminum, LS212566910...325...04-up...crossbolted block, Gen.III, 5.3L, aluminum, SSR truck12571048...325...04-up...crossbolted block, Gen.III, 5.3L12573581...364...98-04...crossbolted cast iron, Gen.III, 6.0L, truck12577184...364...98-04...crossbolted cast iron, Gen.III, 6.0L, truck12577396.........02-up...Gen.III, 4.8L or 5.3L, cast iron, truck14010201...305...80-85...214010202...305...80-85...214010203...305...80-85...214010207...350...80-85...2 or 414010209...350...80-85...2 or 414010280...267...79-82...214011064...350...83......414011148...350...87-89.......Roller cam, one-piece rear seal14016376...267...79-82...214016379...350...77-79...2 or 414016381...305...80-84...214016382...305...79-84...214016383...305...80-85...2...Truck14079287...350...86-90.......Truck14088526...350...87-89.......Roller cam, one-piece rear seal14088548...350...86-88...2 or 414088551...305...86-87...2...one-piece rear main seal14093627...305...87-94...2...Roller or flat tappet cam, one-piece rear seal14093638...350...87-95...2 or 4...Roller or flat tappet cam, one-piece rear seal14094766...305...86-up...2...One-piece rear seal14101147...305...85-up...214101148...350...86-90...4...One-piece rear seal14102058...305...87-91...2...Roller cam, one-piece rear seal22551656.................4...Chevy/Olds Rocket block, 4.00"-4.190" bores, 2.45" main journal sizes, splayed caps, dry sump, 2-piece rear seal, 9.025" deck22551660.................4...Chevy/Olds Rocket block, 4.00"-4.190" bores, 400 mains journal sizes, splayed steel caps, wet sump, raised cam 2-piece rear seal, 9.300" deck. Apr 12, 2012. Cam Identification. Make sure your crank will work in the block you have. Wish List Compare. It was the last really hot Chevy small-block ever done, with the exception being the high-revving Trans Am-inspired 302 c.i.d. © 2020 Power Automedia. Specifications. It may be a 2- or 4-bolt bottom end, 4-bolts are commonly found in trucks/vans/buses as well as some high performance passenger car applications. 14093627 Small Block V8 1987-1991 305, 2 bolt, roller cam, 1-piece rear seal. Some of the 1986-up Chevy small block engines used flat tappet (i.e. It doesn’t indicate a different cam or an earlier or later version. 285/300hp, 64cc chambers, 1.94"/1.5" valves14014415...80-85...267/30514014416...80-86...305..........1.84"/1.5" valves, 58cc chambers14014440...80......305..........1.84"/1.5" valves14019821...80-86...35014019924...79-81...26714019926...80-86...35014010516...80-86...35014020517...80......35014020555...81......30514020556...81......35014022056...85......35014022206...80......35014022301...80-86...30514022601...80-86...267/305......1.72"/1.5" or 1.84"/1.5" valves, 53cc chambers14022801...80-86...30514024816...........350..........76cc chambers, 1.94/1.5 valves, Gen.I crate motors14034806...78-82...26714034807...78-86...30514034808...80-86...35014034808...96-up...350..........76cc chambers, 1.94"/1.5" valves, Gen.I Goodwrench crate motors14034810...80-86...350..........Truck14034811...80-86...350..........Truck14039121...81-86...305..........Truck14039122...81-86...305..........Truck14071114...80-86...35014075381...80-86...350..........Truck14079261...86......35014085844...80-86...350..........Truck14085963...86......35014088526...........350..........Gen.II, LT1, aluminum14089119...86-88...35014094093...86-88...35014096217...80-96...350..........Crate motor, 285hp/300hp, 64cc chambers, 72' or 90' center intake manifold bolt angles14101081...87-95...30514101083...87-up...350..........Gen.I, also used on crate motors, 285 or 300 hp, 64cc chambers, 72' center manifold bolt angles14101128...86-87...350..........Aluminum, 58cc, angle plug14102187...87-91...305..........1.84"/1.5" valves14102191...87-up...35014102193...87-up...350..........1.94"/1.5" valves22542525........................Dart/Olds/Chevy aluminum, 14'or 17' race head.24502559...96-97................Bowtie, "SB2", 1st version, "mirror ports", aluminum, 196cc port, CNC version 280cc port, 38cc chamber25500141........................Buick/Chevy aluminum, 10' race head, 42cc chambers, symmetrical ports, 235cc intake port volumes, 2.1"/1.625" valves25534351C..04-up................Gen.I Bowtie, cast iron Vortec head, 175/65cc ports, 2.00/1.55 valves, "small port head"25534371C..04-up................Gen.I Bowtie, cast iron Vortec head, 206/77cc ports, 2.00/1.55 valves, "large port head"33417369...90-up...350..........Gen.I Goodwrench crate motor,"Hecho en Mexico", 76cc, 0-326711.....................4-bolt, Alum., CanAm, 4.44" bores, steel cylinder liners340220.....427T......68-85...4-bolt345014.....454.......70-86...346236.....454.......75-76...2-bolt359070.....454.......70-90...361959.....454.......73-90...2 or 4 bolt364776.....427T......68-85...4-bolt364779.....366T......68-90...4-bolt399204.....509.......70-71...4-bolt, Alum., CanAm, 4.5" bores, steel Cylinder liners399293.....366T......77-78...4-bolt473478.....427T......77-90...4-bolt495102.......................4-bolt, Alum., CanAm, 4.5" bores3782870....427T......68-76...4-bolt3824553....366T......66-67...4-bolt3855961....396.......65-66...2 or 4 bolt3855961....427.......66......2-bolt3855962....396.......65-66...4-bolt3855977....366T......66-73...4-bolt3869942....427.......66-67...2 or 4 bolt3902406....396.......67......2 or 4 bolt3904351....427.......67......2 or 4 bolt3904354....366T......66-76...4-bolt3916319....366T......68......4-bolt3916321....427.......68......2 or 4 bolt3916323....396.......68......2 or 4 bolt3925521....427T......68-85...4-bolt3935439....427.......68-69...2 or 4 bolt3935440....396.......68-69...2 or 4 bolt3937724....366T......68-85...4-bolt3937726....427T......68-84...4-bolt3946052....427.......69......4-bolt, Alum.