The Buick decoding section contains information about:
- General Engine specs – bore/stroke, firing order
- Engine codes
- Skylark Production numbers
Firing order: Buick (most V8 except HEI): Clockwise 1-8-4-3-6-5-7-2
| CID | Year | Bore X Stroke |
| 300 | 64 – 67 | 3.75 X 3.40 |
| 340 | 66 – 67 | 3.75 X 3.85 |
| 350 | 68 – 80 | 3.80 X 3.85 |
| 400 | 67 – 69 | 4.04 X 3.90 |
| 401 | ||
| 425 | 63 – 66 | |
| 430 | 67 – 69 | 4.1875 X 3.90 |
| 455 | 70 – 76 | 4.312 X 3.90 |
