Casting Number

CID

Years

Valves

Comments

10065202

350

82-86

1.94/1.50

76cc

10065203

350

82-86

1.94/1.50

76cc

10065204

350

82-86

1.94/1.50

76cc

10065205

305

82-86

1.84/1.50

58cc

10065206

350

82-86

1.94/1.50

76cc

10065207

305

82-86

1.84/1.50

58cc

10088113

350

86-92

1.94/1.50

58cc Corvette Aluminum

10120928

350

87-94

1.94/1.50

76cc

10125320

350

94-96

2.00/1.55

Gen II LT1 cast iron version,

10128374

350

92-97

2.00/1.55

Gen II LT1 53 CC angle plug aluminum

10134363

Bowtie High Port 60 CC 210 ~ 258 CC

10159550

350

87-94

1.94/1.50

76cc

10159551

305

87-94

1.84/1.50

58cc

10159552

350

87-94

1.94/1.50

76cc

10159553

305

87-94

1.84/1.50

58cc

10185040

Splayed vavle head 45 CC angle plug

10205245

350

93

2.00/1.55

Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports

10207643

350

94-97

2.00/1.55

Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports

10208890

265

94-96

2.00/1.55

Gen II L99 4.3 Liter V-8, cast iron, reverse flow

10215339

346

97

2.00/1.55

Gen III LS1 aluminum 68cc

10239906

305/350

96-up

1.94/1.50

68cc Vortec

12367713

2.00/1.55

GM Fast burn 62 CC 210 CC intake runner angle plug Vortec

12480005

346

0

2.125/1.625

Gen III LS1 ”GTZ” aluminum 38cc angle plug

12480011

SB2.2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads.

12480034

2.02/1.60

Bowtie Phase III 64cc Angle plug 184 cc intake runner

12506450

350

87-94

1.94/1.50

76cc

12509859

305

87-94

1.84/1.50

58cc

12516852

350

87-94

1.94/1.50

76cc

12551561

350

96

2.00/1.55

Gen II LT1 angle plug aluminum reverse flow cooling

12552520

305

97-99

1.84/1.5

Vortec Truck L-35

12554290

350

94-96

2.00/1.55

Gen II LT1 cast iron version

12555690

350

96

2.00/1.55

Gen II LT-4 55 CC 195 CC intake runner Angle Plug

12555690

350

96

2.00/1.55

Gen II LT-4 55 CC 195 CC intake runner Angle Plug

12556743

325

99 & UP

2.00/1.55

Gen III 5.3L aluminum truck and van

12558059

305

97

1.84/1.5

L-35 Vortec truck

12558062

350

98

1.94/1.5

L-31 Vortec truck 64cc chambers 170cc intake port

12558062

305/350

96-up

1.94/1.50

68cc Vortec

12558806

346

97-98

2.00/1.55

Gen III LS1 aluminum 68cc

12559853

346

99 & UP

2.00/1.55

Gen III LS1 aluminum 68cc

12559895

325

00 & UP

2.00/1.55

Gen III 5.3L aluminum

12564241

346

00 & UP

2.00/1.55

Gen III LS1 aluminum 68cc

12564243

346

2

2.00/1.55

Gen III LS6 aluminum 68cc

12564243

346

2.00/1.55

Gen III LS-6 vette head 65 CC

14008856

267

79-81

1.71/1.50

14010201

305

82-85

1.84/1.50

58cc

14011034

350

80-up

2.02/1.60

64cc Bowtie

14011049

350

82-up

2.02/1.60

64cc Bowtie Aluminum

14014415

267/305

80-85

1.71/1.50

64cc Crack prone

14014416

267/305/350

80-86

1.84/1.50

64cc Crack prone

14019821

350

80-86

1.84/1.50

76cc

14019924

267

79-81

1.71/1.50

14019926

305

80-86

1.84/1.50

14020516

305/350

80-86

1.84/1.50

14020517

350

80-86

1.84/1.50

76cc

14020555

305

81

14020556

350

81

14022206

350

80

1.94/1.50

76cc

14022301

305

80-86

1.84/1.50

58cc

14022601

267/305

79-86

1.72/1.50 1.84/1.50

58cc

14022801

305

80-86

1.72/1.50

58cc

14034806

267

78-82

1.72/1.50

14034807

305

78-82

1.72/1.50

14034808

350

80-86

1.84/1.50

76cc

14034810

350

80-86

14034811

350

80-86

14039121

305

81-86

14039122

305

81-86

14071114

350

80-86

14075381

350

80-86

14079261

350

82-85

14085844

350

80-86

14089119

350

80-86

14096217

350

90-up

1.94/1.50

64cc Crate heads

14101081

305

87-94

1.84/1.50

58cc

14101083

350

88-94

1.94/1.50

64 cc

14102187

305

87-95

1.84/1.50

58cc

14102191

305/350

87-95

1.84/1.50

14102193

305/350

87-95

1.84/1.50

24502559

96-97

Bowtie SB2 1st design”mirror ports” aluminum

25534351C

2.00/1.55

Vortec Bowtie 65 CC 175 cc intake runner

25534371C

2.00/1.55

Vortec Bowtie 65 CC 206 cc intake runner

3238882

350

68-69

1.94/1.50

76cc

3297185

307/327/350

57-67

1.72/1.50

330545

350/400

71-75

2.02/1.60

76cc

330862

400

71-73

1.94/1.50

333881

350

71-76

2.02/1.60

76cc

333882

350/400

70-80

1.94/1.50

76cc

340292

350

73-80

2.02/1.60

64cc Angle plugs turbo’ head No heat riser

354434

262/305

75-80

1.72/1.50

60cc

358741

262/305

71–79

1.72/1.50

359944

350

71-79

1.94/1.50

76cc

3636839

265

55

1.72/1.50

3703523

265

55

1.72/1.50

195HP

3713358

265

55-56

1.72/1.50

3713569

265

55-56

1.72/1.50

3725306

265

56

1.72/1.50

210HP Corvette

3731262

265

56

1.72/1.50

Dual Quad Corvette

3731539

283

57-66

1.72/1.50

283HP Corvette

3731544

265/283

55-61

1.72/1.50

Dual Quad Corvette

3731554

265/283

55-63

1.72/1.50

3731556

283

57

1.72/1.50

3731762

265

56

1.72/1.50

Dual Quad Corvette

3737775

283/327

62-67

1.72/1.50

3740997

283

57

1.72/1.50

Dual Quad FI & 4-brl 220-270HP

3743056

283

58

1.72/1.50

3743096

327

62-67

1.72/1.50

3747363

265

57-62

1.72/1.50

3748056

327

62-67

1.72/1.50

3748720

283

57-58

1.72/1.50

Dual Quad FI & 4-brl Corvette

3748770

283

55-62

1.72/1.50

Dual Quad FI & 4-brl Corvette

3748772

283

57-62

1.72/1.50

Dual Quad FI & 4-brl Corvette

3755537

283

57-62

1.72/1.50

3755538

283

59

1.72/1.50

250-290HP FI Corvette

3755539

283

58-62

1.72/1.50

3755549

283

57-62

1.72/1.50

3755550

283

57-62

1.72/1.50

Dual Quad FI & 4-brl Corvette

3755585

327

62-67

1.72/1.50

3755896

283

62-64

1.72/1.50

3760116

283

59

1.72/1.50

Dual Quad FI & 4-brl Corvette

376445

350

80-84

1.72/1.50

376450

262/305

75-76

1.72/1.50

376495

350

Jun-79

1.94/1.50

76cc

3767460

265/283/327

55-67

1.72/1.50

Car & Truck Corvette

3767462

327

62-67

1.72/1.50

3767465

283

60-61

1.72/1.50

Dual Quad FI & 4-brl Corvette

3767754

283

60-61

1.72/1.50

3767792

283

60-67

1.72/1.50

3770126

327/350

67-70

1.94/1.50

3773012

265

55

1.72/1.50

3774634

327

64-67

1.72/1.50

3774682

283/327

60-67

1.72/1.50

3774684

283/327

57-67

1.72/1.50

3774690

283

58

1.72/1.50

FI Corvette

3774692

283

58-64

1.72/1.50

Dual Quad FI & 4-brl Corvette

3782461

302/327/350

61-70

1.94/1.50

Dual Quad FI & 4-brl Corvette 2.02/1.60 Doubble humps 64cc

3782462

327

67

1.94/1.50

Corvette 2.02/1.60

3792563

327

65-67

3795896

283/307/327

58-72

1.72/1.50

60cc

3796896

283

64-67

1.72/1.50

60cc Chevy II

3798996

327

63-67

3814462

350

67

1.94/1.50

3814480

283/327

60-67

1.72/1.50

3814482

327

62-67

1.72/1.50

3817680

283

59

1.72/1.50

FI 4-brl

3817681

327

62-67

1.72/1.50

3817682

283

61-62

1.72/1.50

3836839

265

55

1.72/1.50

3836842

283/327

57-67

1.72/1.50

3836924

283

63-64

1.72/1.50

3836942

283

58-62

1.72/1.50

3837063

283

58-62

1.72/1.50

3837064

265/283

56-62

1.72/1.50

3837065

265

55-56

1.72/1.50

3837775

283/327

62-67

1.72/1.50

383882

400

71-73

3848720

283

57-58

1.72/1.50

3849820

327

65

1.72/1.50

3854520

283/327

62-67

1.72/1.50

3867802

283

57-60

1.72/1.50

FI Corvette

3873064

265

56-57

1.72/1.50

3876487

350

71-73

1.94/1.50

76cc

3876775

283/327

57-67

1.72/1.50

76cc

3878775

327

64-67

1.72/1.50

3884520

283/327

60-67

1.72/1.50

60cc

3890462

302/327/350

62-68

1.94/1.50 2.02/1.60

64cc Doubble humps

3891462

302/327/350

62-67

1.94/1.50 2.02/1.60

64cc

3891492

327

64-67

1.94/1.50

3911011

327

68

3911032

307/327

68-70

1.72/1.50

70cc

3912264

283

58-62

1.72/1.50

3912265

283

63-64

1.72/1.50

3912291

302/327/350

68-70

1.94/1.50 2.02/1.60

64ccDoubble humps

3912311

350

67

1.94/1.50

3912313

327

65-73

1.72/1.50

3917264

302

67

2.02/1.60

64cc Z-28

3917290

327

68-70

1.72/1.50

3917291

302/327/350

62-69

1.94/1.50 2.02/1.60

64cc Doubble humps

3917292

327

67-68

1.94/1.50

3917293

307/327

68-69

1.72/1.50

76cc

3921175

327

66

1.94/1.50

3923441

350

67-76

1.94/1.50

76cc

3927185

307/327/350

68-79

1.72/1.50

70cc

3927186

302/327/350

68-72

1.94/1.50 2.02/1.60

64cc Doubble humps Bolt holes

3927187

302/350

69-70

2.02/1.60

64cc Corvette

3927188

307/327/350

69

1.72/1.50

76cc

3928454

307

68

1.72/1.50

3928455

302/327

68

2.02/1.60

64cc 325 & 350HP

3928494

327

68

2.02/1.60

64cc 350HP 4-brl

3928495

327

68

1.72/1.50

3931633

307

68-73

1.72/1.50

3931635

350

68-76

1.94/1.50

76cc

3931637

327

68-69

3931638

327

68

1.72/1.50

3931639

302

68

2.02/1.60

64cc

3932441

327/350

67-79

1.94/1.50

76cc

3932454

307/350

68-799

1.72/1.50

76cc

3933148

350

68-73

76cc

3941174

327

68

1.72/1.50

3946812

350

69

1.72/1.50

3946813

350

69-79

76cc

3947014

350

68-70

3947040

302/327/350

68-70

1.94/1.50 2.02/1.60

64cc

3947041

302/327/350

68-79

1.94/1.50 2.02/1.60

64cc

3951598

400

70-71

1.94/1.50

76cc

3961598

400

70-76

1.94/1.50

76cc

3964286

350

68-77

1.94/1.50

76cc

3970126

327/350

67-79

1.72/1.50

3973195

400

71-73

1.94/1.50

76cc

3973414

327/350

64-70

2.02/1.60

64cc Z-28 LT-1 corvette

3973487

350

68-79

1.94/1.50 2.02/1.60

76cc

3973487X

350

68-73

1.94/1.50 2.02/1.60

76cc X cast 10cc’s

3973493

400

70-76

1.94/1.50

76cc

3986316

350

71-72

2.02/1.60

76cc

3986330

350

69-79

1.94/1.50

76cc

3986339

307/350

68-79

1.72/1.50

76cc

3986388

350

68-79

1.72/1.50

76cc

3990941

307/350

68-82

3991492

327/350

68-73

1.94/1.50 2.02/1.60

64cc Angle plug

399380

400

70-73

76cc

3997417

307

71

1.72/1.50

3998916

350/400

72-75

2.02/1.60

76cc

3998920

350

72-75

1.94/1.50

76cc

3998991

307/350

68-79

1.72/1.50

76cc

3998993

307/350

68-79

1.71/1.50 1.94/1.50

76cc

3998997

350/400

71-73

1.94/1.50

76cc

426424

305/350/400

72-82

1.72/1.50

458624

350

69-84

1.94/1.50

76cc

460703

350

78-80

1.94/1.50

76cc

462614

305/350

77-79

1.72/1.50

462624

350

76-87

1.94/1.50 2.02/1.60

76cc Crack prone

464033

350

76-86

1.94/1.50

76cc

464036

350

76-86

1.94/1.50

76cc

468642

350/400

75-84

1.72/1.50

471513

267

79-81

1.72/1.50

472424

305

76-79

1.72/1.50

474213

305

78-82

1.72/1.50

474214

350

78-82

1.94/1.50

76cc

475590

400

78-82

1.94/1.50

76cc

517513

267

79-81

1.72/1.50

6259515

350

73

6260855

350

73-75

1.94/1.50

76cc

6260856

350

73-76

1.94/1.50

76cc

6272070

350

73