Small Block V8 Production

 

 

History and Design Features

 

 

Engine and

 

 

Main

Rod

Main Cap

 

 

model year

Bore

Stroke

Journal

Journal

2 or 4

 

 

262 '75- '76

3.671

3.10

2.45

2.10

2 - bolt

 

 

265 '55- '56

3.75

3.00

2.30

2.00

2 - bolt

 

 

267 '79'- '81

3.50

3.48

2.45

2.10

2 - bolt

 

 

283 '57- '67

3.875

3.00

2.30

2.00

2 - bolt

 

 

302 '67

4.00

3.00

2.30

2.00

2 - bolt

 

 

302 '68 -'69

4.00

3.00

2.45

2.10

4 - Bolt

 

 

305 '76- '91

3.736

3.48

2.45

2.10

2 - bolt

 

 

307 '68- '73

3.875

3.25

2.45

2.10

2 - bolt

 

 

327 '62- '67

4.00

3.25

2.30

2.10

2 - bolt

 

 

327 '68- '69

4.00

3.25

2.45

2.10

2 - bolt

 

 

350 '67- '91

4.00

3.48

2.45

2.10

2-4 bolt

 

 

400 '70- '72

4.125

3.75

2.65

2.10

4 - Bolt

 

 

400 '73- '80

4.125

3.75

2.65

2.10

2 - bolt

 

 

*Chart Courtesy of Chevrolet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cubic inch Chart

 

Stroke

3.000

3.040

3.080

3.100

3.125

3.250

3.480

3.500

3.562

3.625

3.750

3.875

4.000

B

4.000

302

306

310

312

314

327

350

352

358

364

377

390

402

o

4.030

306

310

314

316

319

332

355

357

363

370

383

395

408

r

4.060

311

315

319

321

324

337

360

362

369

375

388

401

414

e

4.125

321

325

329

331

334

348

372

374

381

388

401

414

428

 

4.155

325

330

334

336

339

353

377

380

386

393

407

420

434

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gear Ratios of

 

Common Transmissions Used In Racing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Saginsaw 3-Speed

 

 

 

Saginsaw 4-Speed

 

 

 

 

 

 

 

 

 

 

 

 

1st

2nd

3rd

 

 

 

 

 

1st

2nd

3rd

4th

 

 

 

 

No Lines

2.85

1.68

1.00

 

 

 

 

No Lines

2.84

2.01

1.35

1.00

 

 

 

 

1 Line

2.54

1.50

1.00

 

 

 

 

1 Line

2.54

1.80

1.44

1.00

 

 

 

 

2 Lines

3.11

1.84

1.00

 

 

 

 

2 Lines

3.11

2.20

1.47

1.00

 

 

 

 

3 Lines

3.50

1.89

1.00

 

 

 

 

3 Lines

3.50

2.47

1.65

1.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Second Design T-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Muncie 4-Speed

 

 

 

(Super T-10)

 

 

 

 

 

 

 

 

 

 

 

 

1st

2nd

3rd

4th

 

 

 

 

1st

2nd

3rd

4th

 

 

 

 

No Lines

2.56

1.91

1.48

1.00

 

 

 

No Lines

2.43

1.61

1.23

1.00

 

 

 

 

1 Line

2.20

1.64

1.28

1.00

 

 

 

1 Line

2.64

1.75

1.33

1.00

 

 

 

 

2 Lines

2.52

1.88

1.46

1.00

 

 

 

2 Lines

3.42

2.28

1.46

1.00

 

 

 

 

 

 

 

 

 

 

 

 

3 Lines

2.88

1.91

1.33

1.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gear Ratios

 

 

 

 

 

 

 

 

 

P Glide

P Glide

TH350

TH400

200-4R

700-R4

4L60E

4L80E

 

 

 

 

1st

1.76

1.96

2.52

2.48

2.74

3.06

3.06

2.48

 

 

 

 

2nd

1.00

1.00

1.52

1.48

1.57

1.62

1.62

1.48

 

 

 

 

3rd

N/A

N/A

1.00

1.00

1.00

1.00

1.00

1.00

 

 

 

 

4th

N/A

N/A

N/A

N/A

0.67

0.70

0.70

0.75

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dimensions

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Case

Overall

Face To

 

 

 

 

 

 

 

 

 

 

 

Length

Length

Mount

 

 

 

 

 

 

 

 

 

 

TH350 (short)

21 5/8"

27 5/8"

20 3/8"

 

 

 

 

 

 

 

 

 

 

TH350 (long)

21 5/8"

30 5/8"

20 3/8"

 

 

 

 

 

 

 

 

 

 

TH400 (short)

4.375"

28 1/4"

26 3/4"

 

 

 

 

 

 

 

 

 

 

Th400 (long)

24 3/8"

34"

28"

 

 

 

 

 

 

 

 

 

 

200-4R

27 3/4"

27 3/4"

26 7/8"

 

 

 

 

 

 

 

 

 

 

700-R4

23 3/8"

30 3/4"

22 3/8"

 

 

 

 

 

 

 

 

 

 

700-R4 (vette)

23 3/8"

30"

22 3/8"

 

 

 

 

 

 

 

 

 

 

4L60E

23 3/8"

30 3/4"

22 3/8"

 

 

 

 

 

 

 

 

 

 

4L80E

26"

31 1/2"

30 3/8"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

General Motors Service Parts Small-Block Cylinder-Head

 

 

Identification Guide

 

 

Heads Available from GM only, Unless Otherwise Noted.

 

 

 

 

 

 

Intake-

Combustion-

 

 

 

 

 

 

Part

 

Casting #

 

Runner

Chamber

Valve

Spark

Heat

 

 

 

Number

Description

Number

Material

Volume (cc)

Volume (cc)

Diameter

Plugs

Risers

Notes

 

 

3958603

Service

3991492

Cast Iron

157

64

I: 1.94"

Straight

Yes

Pressed Studs, No Guide Plates

 

 

Replacement

 

 

 

 

E: 1.50"

 

 

 

 

3987376

Service

3991492

Cast Iron

157

64

I: 2.02"

Straight

Yes

Screw-in studs, pushrod guide plates

 

 

Replacement

 

 

 

 

E: 1.60"

 

 

 

 

14034808

Service

N/A

Cast Iron

161

76

I: 1.94"

Straight

Yes

Pressed studs, no guide plates

 

 

Replacement

 

 

 

E: 1.50"

 

 

 

 

464045

Service

462624

Cast Iron

161

76

I: 2.02"

Straight

Yes

Screw-in studs, pushrod guide plates

 

 

Replacement

 

 

 

 

E: 1.60"

 

 

 

 

14101127

Corvette

10088113

Aluminum

163

58

I: 1.94"

Angled

No

Bare, w/ seats and guides

 

 

 

 

 

 

 

E: 1.50"

 

 

 

 

10088115

Corvette

10088113

Aluminum

163

58

I: 1.94"

Angled

No

Assembly w/ springs, valves, studs, and guide plates

 

 

 

 

 

 

 

E: 1.50"

 

 

 

 

10134338

350-HO

10088113

Aluminum

163

58

I: 1.94"

Angled

No

As above, but w/ HD valve springs

 

 

 

 

 

 

 

E: 1.50"

 

 

 

 

14011058

Bow-Tie

14011034

Cast Iron

190

64

I: 2.02"

Angled

No

Off-highway cast iron head

 

 

 

 

 

 

 

E: 1.60"

 

 

 

 

10134392

Revised

14011034

Cast Iron

190

64

I: 2.02"

Angled

No

Latest revision of 14011058-ordering this P/N guarantees obtaining latest casting

 

 

Bow-Tie

 

 

 

 

E: 1.60"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10051108

Semi-Finished

14011034

Cast Iron

190

64

I: 2.02"

Angled

No

No spark plug and pushrod holes

 

 

Bow-Tie

 

 

 

 

E: 1.60"

 

 

 

 

10051167

Phase 6

14011049

Aluminum

180

55

I: 2.02"

Angled

No

Standard port location, NASCAR-legal

 

 

Bow-Tie

 

 

 

 

E: 1.60"

 

 

 

 

14011049

Phase 6

14011049

Aluminum

180

55

N/A

Angled

No

No seats, guides and pushrod holes, NASCAR-legal

 

 

Bow-Tie