HEI DISTRIBUTOR AND OVERDRIVE

Beware, if power is cut to the OD solenoid holding coil and engine load is not cut by killing the ignition at the same time, the OD will not dissengage properly. It will eventually dissengage when the engine/drive train load decreases to the necessary level. It will dissengage with a BANG and JOLT potentially damaging things.

Simply adjust the kickdown switch BEYOND operational limits, so the throttle linkage doesn't hit it. It won't drop out of OD when you floor it, but how often do you floor it anyway?