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Big Block Chevy Engine Parts Identification

Engine Blocks | Cylinder Heads | BBC Cams | Crankshafts | Intake Manifolds | Exhaust Manifolds

 

BBC Engine Block Casting Numbers

  Casting #YearCID Comments
  3402201972-76427 tall truck
  3450141974-86454 truck
  3462361974-76454 215, 2 bolt
  3590701974-90454 truck
  3619591973-85454 car & truck
  3647761968-84427 tall truck
  3647791968-88366 tall truck
  4734781968-84427 tall truck
  37828701968-76427 tall truck
  38550611965-67396  
  38559611966-67396 325, 360, 2 bolt
  38559621965-66396 360, 375, 425, 4 bolt
  38559771965-67366 tall truck
  38669611966-69396 Chevy, Chevy truck
  38699421966-67427 390, 425, 2&4 bolt
  38738581966396 375, 4 bolt
  39024061967396 325, 350, 375, 2&4 bolt
  39024661965-67396 ??
  39043511967427385, 390, 400, 425, 430, 435, 2&4 bolt
  39043541966-67366 tall truck
  39163191968-85366 tall truck
  39163211968427385, 390, 400, 425, 430, 435, 2&4 bolt
  39163231968396325, 350, 375, 2&4 bolt
  39183191966-70366Chevy truck, GMC, tall truck
  39255211968-85366 tall truck
  39283191969-73366GMC, tall truck
  39354391968-69427 335, 390, 400, 425, 430, 435, 2&4 bolt
  39354401968-69396 265, 325, 350, 375, 2&4 bolt
  39377241968-85366 tall truck
  39377261968-84427 tall truck
  39552701969427335, 390, 400, 425, 430, 435, 2&4 bolt
  39460521969427430 ZL-1, 4 bolt, aluminum
  39552721969396/402265, 325, 350, 375, 2&4 bolt
  39552741968-85366 tall truck
  39552761968-84427 tall truck
  39635121969-71427 335, 390, 400, 425 COPO, 430, 435,
454 345, 360, 365, 390, 425, 450 2&4 bolt
  39635131973-76454 215
  39654401968-69396
  39654491968-72396
  39655401968396
  39698541969-72396/402240, 265, 300, 325, 330, 350, 375,
454360, 2&4 bolt
  39698581968-84427 tall truck
  39992891972-78454 215, 235, 240, 270, 2 bolt, car & truck
  39992901972402240, 2 bolt
  39992931968-85366 tall truck
  39992941968-84427 tall truck
  62721761968-76366Chevy, GMC, tall truck
  62721771972402210
  62721811973-76427tall truck
  14015441975-87454 truck

Big Block Chevy Cylinder Heads

Open vs. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. Open-chamber designs are larger and provide lower compression ratios, so require a much larger piston dome to achieve the same compression as a closed-chamber head.

Use of either style head requires that the correct pistons are used, otherwise...

BBC Cylinder Head Casting Numbers
RECTANGULAR PORT - Valve size 2.19 intake, 1.88 exhaust
Casting Years CID Chamber CC HP/RPO/Comments
39043921967427 Closed106.8430, 435 L-88/L-89, 1.72 ex
39198421968-69396 375 L-89
427 Closed106.8430, 435 L-88/L-89, 1.84 ex
39460741969-71396,402 375 L-89, 427 430 L-88/ZL-1
454 Open118.0425, 465 LS-6/LS-7, round ex
10051128 1990-94 454 Semi Open 72cc, IP 400cc, bowtie, sym port
14011077 1989-94454 Open 118.0cc, IP 295cc, replacement, C port
140448611989-94454 Open425, 105.0cc, IP 380cc, bowtie, W port
38562081965396Closed108.9375, 425 Z-16/L-37, 1.72 ex
38738581966-67396 375 L-78
427Closed108.9425 L-72, 1.72 ex
39043911965-67396 375 L-78
427Closed106.8425, 435 L-71/L-72, 1.72 ex
39198401967-69396 375 L-78, 1.72.ex
427Closed109.0425, 435 L-71/L-72, 425 COPO
39642911969-70396/402 375 L-78, Intake Port 325cc
427 425, 435 L-71/L-72
454 Closed450 LS-6, 108.0cc
39642921970454 Closed450 LS-6, 109.0cc
39940251971454 Open425 LS-6, 118.0cc
39940261971454 Closed425 LS-6, 118.0cc
62587231971454 Open425
62729901971-94454 Open425, 118.0cc, IP 325cc
14096188 1987-94 454Open 425, 118.0cc, IP 325cc, replacement
14097088 1989-94 502 OpenGEN V, 118.0cc, IP 325cc, replacement

OVAL PORT - Valve size 2.06 intake, 1.72 exhaust

CastingYearsCID ChamberCCHP/RPO/Comments
3308641970-81366/427/454 Open
3308651970-84366/427/454 Open
3367651973-84427/454 Open
3367811973-85454 Open 113.0cc
3437711968-85366/427/454 Open
3437721976-84366/427/454 Open
3437831975-78454 Open car & truck
3462361975-87454 Open 113.0cc
3462381975-87454 Open 113.0cc
3530491970-73402/454 Open 113.0cc
4733281968-85366 Open
38562061965-66396 Closed325 97.2cc
38562131966-70366 Closed truck
38727021966396 325, 360 L-34/L-35
427Closed 390, L-36 98.4cc
38768751966-70427 Closed truck
39043901966-67396 325, 350 L-34/L-35
427Closed390, 400, L-36/L-68 98.4cc
39043931966-68366 Closed truck
39098021966-67396 325, 350 L-34/L-35
427Closed385, 390, 400, L-36/L-68 100.9cc
39172151967-69396 325, 350 L-34/L-35
427Closed 335, 385, 390, 400 100.9cc
39172191966-70366/427Closed truck
39310631969-70396 325, 350 L-34/L-35
427Closed335, 385, 390, 400 100.9cc
39331481969366/396 Open2V/427 265 122.1cc car & truck
39331491969-70427 Open 122.1 cc truck
39642801966-70427 335, 385, 390, 400
454 Closed 345, 360, 390 LS-5
39642901969-70396/402325, 330, 350
427 335, 385,390, 400
454 Closed345, 360, 390 LS-5 100.9cc
39651981969396 truck
39759501968-70366/427 Closed truck
39861331970-85366/427 Closed truck
39861361970-84366/427 Closed truck
39938201971402 300, 330 LS-3
454Open 365 LS-5 113.0cc
39992411972402 240, 300, 330 LS-3
454Open365 LS-5 113.0cc
62722921971402240, LS-3
454Open270, LS-5
101011361991-94454Opentruck
101210331978-88454Opentruck
123527831979-93454Opentruck
140251751983-93454Opentruck
140810441986-90454Opentruck
140923591986-89427Opentruck
140923601985-89454Opentruck
141013981986-90454Opentruck

BBC Camshaft Part Numbers

Part #YearType LiftDur @ .050 liftComments/Specs/RPO's/Apps
340282 Solid .560I/.560E .262I/.262E 121 deg overlap, competition-short track apps
3530401973-74Hyd .440I/.440E .210I/.210E production Corvette
38631431965-71Solid .520I/.520E .242I/.242E See Note 1
38839861965-72 Hyd .460I/.488E .213I/.217E See Note 2
3904362 1965-71 Solid .520I/.520E .242I/.242E See Note 3
3925533 1965-69 Solid .540I/.560E .262I/.269E 133 deg overlap, 427 L-88, Reverse rotation
3925535 1965-69Solid .540I/.560E .262I/.269E 133 deg overlap, 427 L-88, standard rotation
3959180 1969-70Solid .560I/.600E .262I/.273E 135 deg overLap, 427 ZL-1, 454 LS-7
3994094 Solid .600I/.600E .286I/.286E See Note 4
6272989 Hyd .500I/.500E .222I/.221E 121 deg overlap, marine grind or HP street
14096209 Hyd .500I/.500E .222I/.221E 121 deg overlap, marine grind or HP street (6272989)

Note 1: 80 deg overlap, 396 375hp L-78/L-89, 427 425/435hp L-71/L-72, 454 450hp LS-6, HP street
Note 2: 396 325/350hp L-34/L-35, 427 385/390/400hp L-36/L-68, 454 345/360/390hp LS-4/LS-5, good torque/HP
Note 3: 80 deg overlap, 396 375hp L-78/ L-89, 427 425/435hp L-71/L-72, 454 450hp LS-6, HP street
Note 4: 148 deg overlap, maximum power with F.I. or tunnel ram, Can Am


BBC Crankshaft Part Numbers

Casting #YearCIDComments/Specs/RPO's/Apps
330570 427 truck,1053,forging number 6223
3367821970-74 454 with automatic transmission
38796211967 427 L-88, See Note 1
38828411965-71 396 See Note 2
38828421965-69 427 forged, cross drilled, balanced for 11:1 CR
3882849 1966-69 427
38871141965396 tufftrided, 5140
3963521 454 4 in stroke, 5140, raw forged
39635231970-71454 LS-6, See Note 3
39635241970-71454 LS-7, See Note 4
39657461965-69430 raw forged, semi finished, 3.4-3.8 stroke
39657531970-72495 raw forged, semi finished, 3.9-4.25 stroke, 5140
39678111968-69427 L-88/ZL-1, See Note 5
39759451970454 with manual transmission
3993804427 raw forged, 3.75 stroke, 5140
39938781971-72 454 LS-6
10051169454 raw forged, 4340, 3.75-4.25

Note 1: L-88, with 3/8 in bolt rods, balanced for 12.5:1 CR, tufftrided, cross drilled
Note 2: forged, cross drilled, 3.76 stroke, tufftrided, balanced for 11:1 CR
Note 3: 1053, tufftrided, cross drilled, balanced for 9.25:1 or 11.25:1 CR, forging number - 3520 and 7416
Note 4: 4 in stroke, HD, 5140, LS-7, balanced for 12.5:1 CR, tufftrided, cross drilled
Note 5: tufftrided, 5140, with 7/16 in bolt rods, tufftrided, cross drilled, forging number - 7115

 

BBC Exhaust Manifold Casting Numbers

  Cast # YearsSideCIDApplications
  3292251973-76LH454
  3530281973-76LH454
  3530301973-76LH454police
  38562971965LH396325
  38563011965LH396425 Corvette
  38563021965RH396 425 Corvette
  38563061965RH396 325
  38572971965LH396 325
  38688741965-66RH396325, 360, 375 Z-16
  38699251965LH396 375 Z-16
  38727701966RH396
  38808271966-69LH427/454 Corvette
  38808281966-72RH427/454 Corvette
  38808691970-72LH454 Corvette
  38839991966LH396 325, 360, 375
  38845041966-67RH396/427 325, 385, 390
  38923071966-67LH396/427 325, 390
  39024011967LH396
  39043991966LH396
  39098791967-70LH396/427 COPO/454 325, 350, 375, 425, 430
  39098801967RH396 325, 350, 375
  39146131968-70LH396/427 265, 325, 335, 345, 390, 425
  39161781968-70RH396/427 COPO/454 325, 350, 375, 425, 430
  39698691970-74LH454 Corvette
  39893101971-72RH402/454
  39893431971-72LH402/454
  39940451973-75LH454 police

BBC Intake Manifold Casting Numbers

ALUMINUM RECTANGULAR PORT - Holley 4V
CastingYearsCIDHP/RPO/Config
38669631965396375, 425 L-37
38850691966-68396 375 L-78
427425 L-72
38860931967427430 L-88
38943741967427435 3x2 L-71
38943821967427400 3x2 L-68, oval port
39198491968427390 L-36, oval port, Qjet
39198501968427400 3x2 L-68, ovat port
39198521968427435 3x2 L-71
39198781968396375 L-78
427425 L-72
39331631968-69396 375 L-78/L-89
427425 copo
39331981968-69427 430 L-88/ZL-1
39377931968427390 L-36, oval port, Qjet, Late
39377951969427400 3x2 L-68, oval port
39377971969427435 3x2 L-71
39478011969427390 L-36, oval port, Qjet
39635691970-71396/402 375 L-78/L-89
454 LS-6, lowrise
39674741971454 425
62693181972454

BBC Intake Manifold Casting Numbers

IRON OVAL PORT - Rochester Q-jet 4V
CastingYearsCIDHP/RPO/Config
3367891974 454235, 270
3462421975 454215
3530151973 454215, 245
3938411973-75454215
38562891965-66396 325 L-35
38669481966-67396 325, 360 L-34/L-35
427390, Holley
38839481966-68396 325 L-35
427385, 390 L-36
39310671969396325 L-35
427335, 390 L-36
39529001969396265 2V
39552871970-71402 300, 330, 350 LS-3
454360, 365, 390
62637531972402240 LS-3
454240, 270


Last updated: 10/20/2011
Author: MadMike Maciolek

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