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Ignition timing for 1972 olds 455?

Initial Timing:

* Manual Transmission: 8° to 12° BTDC

* Automatic Transmission: 10° to 14° BTDC

Timing Advance:

* Centrifugal Advance: 23° to 30° crankshaft degrees, all-in at 3,000 rpm

* Vacuum Advance: 15° to 17° crankshaft degrees, all-in at 1,500 to 2,000 rpm

Total Timing

* Automatic Transmission: 35° to 38° crankshaft degrees BTDC at 3,000 rpm

* Manual Transmission: 33° to 36° crankshaft degrees BTDC at 3,000 rpm

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