Chevrolet BB Topplock

The list may contain errors

Casting
Number

CID

Years

Valves

Comments

10045427

Pontiac/Chevy Aluminum, 91cc chamber Large Rectangle Port

10049875

Pontiac/Chevy Aluminum Small Rectangle port

10051128

454

90-94

2.19/1.88

72cc Bowtie Aluminum Rectangular port 400cc intake

10052902

427

Oval Port Open chamber

10101136

454

91-94

2.06/1.77

Open chamber Oval port

10101140

366/427

91-01

Oval Port Closed chamber

10114156

454

91-01

Oval Port Open chamber

10121033

454

78-88

2.06/1.77

Open chamber Oval port

10141279

454

96-01

Vortec 7400 100cc chambers Oval Port

10487052

366

77-90

Oval Port Open chamber

12352783

454

79-93

2.06/1.77

Open chamber Oval port

12363391

Oval Port Bowtie Aluminum Signature Series

12363401

Rectangle Port Bowtie Aluminum Signature Series

12558162

496

01 & UP

Gen.VII Vortec 8100 8.1L truck

12560241

454

98-01

Vortec 7400 100cc chambers Oval Port

12562932

454/502

91-95

Oval Port truck crate motor 118cc chambers

12562934

502

00 & UP

GenVI Marine

14011077

454

89-94

2.19/1.88

118cc Replacement Aluminum Rectangular port 295cc intake

14025175

454

83-93

2.06/1.77

Open chamber Oval port

14044861

454

89-94

2.19/1.88

106cc Bowtie Aluminum Rectangular port 380cc intake

14081044

454

86-90

2.06/1.77

Open chamber Oval port

14081045

454

78-87

Oval Port Open chamber

14081052

366/427/454

85-87

Oval Port Open chamber

14092359

427

86-89

2.06/1.77

Open chamber Oval port

14092360

454

85-89

2.06/1.77

Open chamber Oval port

14096188

454

87-94

2.19/1.88

118cc Replacement Rectangular port 325cc intake

14097088

502

89-date

2.19/1.88

118cc Replacement Rectangular port 325cc intake GEN V

14101398

454

86-90

2.06/1.77

Open chamber Oval port

24502585

Olds/Chevy DRCE 2 Pro Stock aluminum

330864

366/427/454

70-81

2.06/1.77

Open chamber Oval port

330865

366/427/454

70-84

2.06/1.77

Open chamber Oval port

330866

366/427

68-78

Oval Port Open chamber

330867

427

68-73

Oval Port Open chamber

336768

427

73-76

Oval Port Open chamber

336781

454

73-85

2.06/1.77

113cc Oval port

343771

366/427/454

68-85

2.06/1.77

Open chamber Oval port

343772

366/427/454

76-84

2.06/1.77

Open chamber Oval port

343783

454

75-78

2.06/1.77

Open chamber Oval port

346236

454

75-87

2.06/1.77

113cc Oval port

346238

454

75-87

2.06/1.77

113cc Oval port

352625

454

70-76

Oval Port Open chamber

353049

454

70-73

2.06/1.77

113cc Oval port

366765

427/454

73-84

2.06/1.77

Open chamber Oval port

3732791

348

58

3758379

348

59-61

3759256

348

58

3767738

348

59-61

3781147

348

60-61

High Perf

3795586

409

61

360HP

3814690

409

62-64

High Perf

3819333

348/409

62-65

3830817

409

63-65

340HP

3837731

409

63

High Perf Z-11

3852583

409

65

400HP

3856206

396

65-66

2.06/1.77

98cc Oval port

3856208

396

65

2.06/1.77

109cc Z-16/L-37 Rectangular port

3856213

366

66-70

2.06/1.77

Closed chamber Oval port

3856260

396

68

Oval Port Closed chamber

3872702

396/427

66

2.06/1.77

98cc Oval port L-34/L-35/L-36

3873858

396/427

66-67

2.06/1.77

109cc L-78/L-72 Rectangular port

3876875

427

66-70

2.06/1.77

Closed chamber Oval port

3904390

396/427

66-67

2.06/1.77

98cc Oval port L-34/L-35/L-36

3904391

396/427

65-67

2.06/1.77

107cc L-78/L-71/L-72 Rectangular port

3904392

427

67

2.19/1.88

106cc L-88/L-89 Aluminum Rectangular port

3904393

366

66-68

2.06/1.77

Closed chamber Oval port

3908952

427

67

Oval Port Open chamber

3909802

396/427

66-67

2.06/1.77

100cc Oval port L-34/L-35/L-36/L-68

3917215

396/427

67-69

2.06/1.77

100cc Oval port L-34/L-35

3917219

366/427

66-70

2.06/1.77

Closed chamber Oval port

3919840

396/427

67-69

2.06/1.77

107cc L-78/L-71/L-72 Rectangular port

3919842

396/427

68-69

2.19/1.88

106cc L-88/L-89 Aluminum Rectangular port

3931063

396/427

69-70

2.06/1.77

100cc Oval port L-34/L-35

3933148

366/396/427

69

2.06/1.77

122cc Oval port

3933149

427

69-70

2.06/1.77

122cc Oval port

3935401

427

68-76

Oval Port Open chamber

3946074

396/454

69-71

2.19/1.88

118cc L-88/ZL-1 Aluminum Rectangular port

3964280

427/454

66-70

2.06/1.77

Closed chamber Oval port

3964290

396/402/427/454

69-70

2.06/1.77

100cc Oval port

3964291

396/402/427/454

69-70

2.19/1.88

108cc L-78/L-71/L-72/LS-6 Rectangular port 325cc intake

3964292

454

70

2.19/1.88

109cc LS-6 Rectangular port

3965198

396

69

2.06/1.77

Open chamber Oval port

3975950

366/427

68-70

2.06/1.77

Closed chamber Oval port

3986133

366/427

70-85

2.06/1.77

Closed chamber Oval port

3986136

366/427

70-84

2.06/1.77

Closed chamber Oval port

3993820

402/454

71

2.06/1.77

113cc Oval port

3994025

454

71

2.19/1.88

118cc LS-6 Rectangular port

3994026

454

71

2.19/1.88

118cc LS-6 Rectangular port

3999241

402/454

72

2.06/1.77

113cc Oval port

473328

366

68-85

2.06/1.77

Open chamber Oval port

6258723

454

71

2.19/1.88

118cc LS-6 Rectangular port

6272292

402/454

71

2.06/1.77

Open chamber Oval port

6272990

454

71-94

2.19/1.88

118cc Replacement Rectangular port 325cc intake