"Buick Trademark(s) used with the written permission of General Motors"
| Head Cast # | Year | Displacement |
| 1232650 | 71? | 350 |
| 1233472* | 67-72 | 350 |
| 1237650* | 70-72 | 350 |
| 1238145* | 67-72 | 350 |
| 1233472 | 67-70 | 350 |
| 1237650* | 70-72 | 350 |
| 1237749 | 70-76 | 350 |
| 1238145 | 68-74 | 350 |
| 1240143 | 70-71 | 350 |
| 1241861** | 72-80 | 350 |
| 1242145* | 72 | 350 |
| 1242556* | 70-80 | 350 |
| 1243452** | 72-80 | 350 |
| 1247716 | 70-77 | 350 |
| 1382546 | 68-69 | 350 |
| 1382546* | 68-74 | 350 |
| 1382720 | 68-70 | 350 |
| 22505236 | 73-80 | 350 |
| 22505238** | 72-80 | 350 |
| 243452** | 75-79 | 350 |
| * Oils through push rods ** With A.I.R. 350 heads are 58cc |
||
| Block Cast # | Year | Displacement |
| 1241748 | 62-80 | 350 |
| 1231447 | 71? | 350 |
| 1233472 | 67-68 | 350 |
| 1237650 | 70-72 | 350 |
| 1382201 | 70-? | 350 |
| 481990 | 70-72 | 350 |
| 25504744 | 72-80 | 350 |
| Exhaust Manifold Cast # |
Year | Displacement |
| 13381328 pass 1231359 driver |
70 | 350 |
| 1246656 right 1246713 left |
75 | 350 |
| 1246658 right 1243457 left |
71-74 | 350 |
| 1246658 right 1383427 left |
68-70 | 350 |
| 1381750 right 1231359 left |
70 | 350 |
| Intake Manifold Cast # |
Year | Displacement |
| 1231381 | 70 | 350 2bbl |
| 1231924 | 70 | 350 4bbl |
| 1236402 | 71 | 350 2bbl |
| 1236839 | 71 | 350 4bbl |
| 1238578 | 72 | 350 2bbl* |
| 1238586 | 72 | 350 4bbl |
| 1238643 | 72-73 | 350 2bbl |
| 1238647 | 72-73 | 350 4bbl |
| 1242014 | 72-73 | 350 2bbl* |
| 1242015 | 72-73 | 350 4bbl* |
| 1245057 | 74 | 350 2bbl |
| 1245058 | 74 | 350 4bbl |
| 1246677 | 75 | 350 4bbl calif. |
| 1249166 | 75 | 350 2bbl |
| 1249168 | 75 | 350 4bbl |
| 1382615 | 68 | 350 4bbl |
| 1382616 | 68 | 350 2bbl |
| 1386845 | 69 | 350 2bbl |
| 1387069 | 69 | 350 4bbl |
A letter or number after the casting number as in 1165165 X or -3 may indicate a change in update in the casting. This would mean a higher letter would be a later production.
A letter or number after the casting number as in 1165165 X or -3 may indicate a change in update in the casting. This would mean a higher letter would be a later production.