Ignition Timing
| Spark Control Computer | Basic Timing |
| 4289601 | 16 Degrees (deg) |
| 4289603 | 12 Degrees (deg) |
| 4289613 | 12 Degrees (deg) |
| 4289615 | 16 Degrees (deg) |
| 4289617 | 12 Degrees (deg) |
| 4289621 | 12 Degrees (deg) |
| 4289637 | 8 Degrees (deg) |
| Spark Control Computer | Basic Timing |
| 4289601 | 16 Degrees (deg) |
| 4289603 | 12 Degrees (deg) |
| 4289613 | 12 Degrees (deg) |
| 4289615 | 16 Degrees (deg) |
| 4289617 | 12 Degrees (deg) |
| 4289621 | 12 Degrees (deg) |
| 4289637 | 8 Degrees (deg) |