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1st Gen Information

1st Gen Options and Codes


Cowl Tag, Vin Decode
Cowl Decode
Vin Decode
Chevy V8 Bore and Stroke List
Small Block Chevy Casting Numbers
SBC Block Casting Numbers
SBC Block Suffix Codes
SBC Head Casting Numbers
SBC Crankshaft Casting Numbers
SBC Intake Manafold Casting Numbers
SBC CamShaft Numbers
SBC Piston Numbers
Big Block Chevy Casting Numbers
BBC Block Casting Numbers
BBC Block Suffix Codes
BBC Head Casting Numbers
BBC Crankshaft Casting Numbers

 Muncie 4 Speed Identification
Chevy Bellhousing Identification
67, 68, 69 and 2nd Generation Camaro Gallery

Links for Information, Service and Parts

Links to Parts Manufacturers

BBC Block Casting Numbers

Click Header to Sort

Casting Number

Size

Year

Main Bolts

Notes

0-326711

 

 

4

Alum., CanAm, 4.44" bores, steel cylinder liners

340220

427T

68-65

4

 

345014

454

70-86

 

 

346236

454

75-76

2

 

359070

454

70-90

 

 

361959

454

73-90

2 or 4

 

364776

427T

68-85

4

 

364779

366T

68-90

4

 

399204

509

70-71

4

Alum., CanAm, 4.5" bores, steel Cylinder liners

399293

366T

77-78

4

 

473478

427T

77-90

4

 

495102

 

 

4

Alum., CanAm, 4.5" bores

3782870

427T

68-76

4

 

3824553

366T

66-67

4

 

3855961

396

65-66

2 or 4

 

3855961

427

66

2

 

3855962

396

65-66

4

 

3855977

366T

66-73

4

 

3869942

427

66-67

2 or 4

 

3902406

396

67

2 or 4

 

3904351

427

67

2 or 4

 

3904354

366T

66-76

4

 

3916319

366T

68

4

 

3916321

427

68

2 or 4

 

3916323

396

68

2 or 4

 

3925521

427T

68-85

4

 

3935439

427

68-69

2 or 4

 

3935440

396

68-69

2 or 4

 

3937724

366T

68-85

4

 

3937726

427T

68-84

4

 

3946052

427

69

4

Alum. ZL-1, Mark IV

3946053

427

97-UP

4

Alum. ZL-1, 2nd version, Mark IV

3955270

427

69

2 or 4

 

3955272

396

69

2 or 4

 

3955274

366T

68-85

4

 

3955276

427T

68-73

4

 

3963512

427

69

2 or 4

 

3963512

454

70-76

2 or 4

 

3969852

366T

68-84

4

 

3969854

396

69

2 or 4

 

3969854

402

70-72

2 or 4

 

3969858

427T

68-84

4

 

3999289

454

71-79

2 or 4

Some "CE" replacement blocks had four bolt main caps

3999290

396

68-69

2 or 4

Truck

3999290

402

70-72

2 or 4

Truck

3999290

402

72

2 or 4

Passanger

3999293

366T

68-90

4

 

3999294

427T

68-84

4

 

10051107

454

 

4

Bowtie, MkIV, 9.8" deck, siamesed bores, 4.25" semi-finished bores, can be bored to 4.50"

10069282

366T

90-91

4

Mark IV, Tall deck

10069284

427T

 

4

Mark IV, Tall deck

10069286

454

90-91

4

Mark IV, Short deck

10114182

454

91-UP

4

Gen.V

10114183

366T

91-UP

4

Gen.V

10114184

427T

91-UP

4

Gen.V

10134366

454T

 

4

Bowtie, Gen.V, Tall deck

10185050

454

 

4

Bowtie, Gen.V, Short deck

10237297

454

96-UP

4

Vortec 7400", "L-29" Gen.VI

10237299

427T

96-UP

4

Gen.VI, 7.0L, truck

10237300

502

96-UP

4

Gen.VI, 4.466" bore

12550312

427T

96-UP

4

Gen.VI, 4.250" bore, fuel pump boss, clutch linkage pivot boss

12550313

454

91-UP

4

Gen.V crate motor, Gen. VI 4.25" bare block, fuel pump boss

12556110

496

01-UP

4

Gen.VII 8.1L, "Vortec 8100", Truck

12561357

454

96-UP

4

Gen.VI

12561358

502

 

4

Gen. VI

14015443

454

87-90

2 or 4

Mark IV, Truck, Motorhome

14015445

454

78-90

2 or 4

 

14044807

454T

 

4

Bowtie, MkIV, CNC prep, Tall deck, 4.25" bore or 4.495" bores

14096859

502

 

4

Gen.V, HO

24502504

454

 

4

Bowtie, Gen.V, Race prep, 9.8 "short" deck height

24502506

454T

 

4

Bowtie, Gen.V, Race prep, 10.2 "tall" deck height

24502572

 

 

4

4.50" Bore Olds DRCE 2, 9.5" deck height

25534402+A34

 

 

4

4.590" bore Olds DRCE 3, 9.25" deck height

T = Tall deck, 10.2" deck height 1991 and later Gen.V, VI and VII production BBC motors have one-piece rear main crank seals.


We would like to thank everyone that has contributed to the data provided on this site.
This information has been gathered from several sources and has not been verified.