| ENGINE | YEAR | DESCRIPTION | CASTING # | Part # |
| Pontiac 8 Cylinder | ||||
| 265 (4.3L) | 80-81 | 65 | 4889 | |
| 301
(4.9L)
|
80-81 | w/A.I.R. | 1 | 4890 |
| w/o A.I.R. | 1 | 4886 | ||
| 350P
|
73-74 | w/o A.I.R., specify cast number | 46, 5C | 4882 |
| 73-76 | w/A.I.R., specify cast number | 5C, 6X | 4883 | |
| 76-77 | Specify casting number over exhaust port | 5C, 6X | 4884 | |
| 400
|
73-74 | w/A.I.R., 2 barrel, [1, 3,5] | NA, 6X, 6H, 4X, 46, 5C | 4891 |
| 73-76 | w/o A.I.R., 2 barrel, [1, 3, 5] | NA, 6H, 4X, 46, 5C, 494348 | 4892 | |
| 1974 | w/o A.I.R., 4 barrel, manual trans, [2, 3, 5,] | 6H, NA | 4893 | |
| 75-76 | w/o A.I.R., 4 barrel, [2, 3, 5] | 5C, 6H, 6X, 492466 | 4894 | |
| 75-78 | w/A.I.R., [2, 3, 5] | 4X, 5C, 6H, 6X, 492466 | 4895 | |
| 455
|
73-75 | w/o A.I.R., [2, 3, 5] | 46, 4X, 5C, 494341 | 4898 |
| 75-77 | w/A.I.R., [2, 3, 5] | 4X, 5C, 494341, 495351 | 4899 | |
[NOTES] [1] 1 31/32"
intake valve
[2] 2 7/64" intake valve
[3] 1 21/32' exhaust valve
[4] 1 49/64" exhaust valve
[5] 8:1 compression ratio
[6] 8.2:1 compression ratio
CAUTION: Pontiac 350,
400, & 455 cylinder heads use the same casting numbers.
This does not mean they will interchange in all instances because
machine work after casting differentiates these units.