Engine timing should be set after installation. Use a stroboscopic timing light. Timing should be set initially at 30-32° BTDC at 3,500+ RPM, vacuum hose disconnected and plugged. Maximum advance, at 3,500+ RPM, vacuum hose connected, with no load on engine (car sitting still), light throttle, should not exceed 42-44° BTDC.

Recommended use of a  Bosch Blue or other hi-energy Epoxy coil (3.4 ohms primary/12k ohms secondary) with built-in resistor. An external ballast resistor may be used between the power source and the distributor if your coil does not feature a built-in resistor.