[Ollie]

Now that the electrical items are done the mechanical and vacuum advance mechanisms need to be disabled, since the computer will take over controlling the timing. Start by cutting a thin (1/8”thick?) piece of metal into a 1 by 3/8 “strip. Then drill two holes in the strip a little more than 5/8” apart. The diameter of the holes should match the pin diameters holding the centrifugal weight springs. Once the strip is made, remove the centrifugal advance springs, the weights, the E-clips holding the weight stop to the distributor shaft and the weight stop. Install the metal strip you made on one pair of pins. It doesn’t matter which set of pins, either will do. Then replace the E-clips, finally, to disable the vacuum advance, simply leave the vacuum line off the vacuum motor port. It is recommend putting a rubber plug over the port, or cut it off for a more permanent modification. If the port is left open, an unknowing mechanic might reconnect a vacuum line to the vacuum motor and damage the engine. You have now completed the HEI computer controlled distributor conversion. (See Figure7)