Vacuum Advance
| Vacuum Advance Note: On models not equipped with centrifugal advance mechanism, ignition timing controlled by ignition control module. | Vacuum Advance No. Note: Identification number stamped on distributor housing. | C34 | D59 | D62 | D64 | D73 | J10 | RE-021B | RE-028 |
| Vacuum to Start Plunger | 3.1 Inch Of Mercury (in Hg) | 4 Inch Of Mercury (in Hg) | 4.13 Inch Of Mercury (in Hg) | 0.94 Inch Of Mercury (in Hg) | 1.1 Inch Of Mercury (in Hg) | 2.95 Inch Of Mercury (in Hg) | 1.5 Inch Of Mercury (in Hg) | 1.5 Inch Of Mercury (in Hg) | |
| Max. Advance @ Vacuum | 5.5 at 13.31 Degrees At Inches Mercury (deg @ in hg) | 7 at 14 Degrees At Inches Mercury (deg @ in hg) | --- | 9.2 at 1.38 Degrees At Inches Mercury (deg @ in hg) | 9 at 2.17 Degrees At Inches Mercury (deg @ in hg) | 10 at 9.45 Degrees At Inches Mercury (deg @ in hg) | 10 at 11.5 Degrees At Inches Mercury (deg @ in hg) | 10 at 11 Degrees At Inches Mercury (deg @ in hg) | |
| Max. Retard @ Vacuum | --- | --- | 7 at 9.84 Degrees At Inches Mercury (deg @ in hg) | --- | --- | --- | --- | --- |