* Type: Mechanical
* Firing order: 1-8-4-3-6-5-7-2
* Timing mark: 0° TDC on the harmonic balancer
* Ignition timing: 6° BTDC (base timing)
* Dwell: 28°-32°
Note: These timing and dwell specifications are for a stock 1971 Chevy 400 V8 engine. If your engine has been modified, the timing and dwell may need to be adjusted.