Mechanical Specifications
| Spark Control Computer | 4289813 | 4289913 | 4289919 | 4289921 |
| Vacuum Advance (Range) | --- | --- | --- | --- |
| Accumulator Time (In Minutes) | --- | --- | --- | --- |
| Spark Advance Test @ 2000 RPM Note: Includes Basic Timing | 46 +/- 4 | 46 +/- 4 | 38 +/- 4 | 38 +/- 4 |
| Electronic EGR Time Delay | 20 | 20 | 50 | 30 |
| Oxygen Feedback Electronic Air Switching | Equipped | Equipped | Equipped | Equipped |