Fifty degree reference angle installation instructions:
Remove rotor to verify that module is mounted in the 50 degree position, if not, remove two module mounting screws, and shift the module to the 50 degree position, replace rotor.
Rotate engine to 50 degrees BTDC on the compression stroke.
Disconnect the negative coil (coil trigger) wire.
Reconnect the negative battery cable.
Install distributor with the rotor pointing in the general direction of the number one cylinder.
With the red wire connected to 12V, the ignition key in the run position, and the “Cam/Hall Effect” plug connected, rotate the base of the distributor counterclockwise until the cam LED illuminates, then continue counterclockwise until the next crank signal (crank LED illuminates).
Move the base of the distributor back and forth until you find the leading edge of that crank signal, lock down the distributor and you’re finished.
The distributor is now timed and phased properly for a fifty degree reference angle! Connect all spark plug and coil wires before cranking the engine!