[mbaize]

I need help wiring my pc-7001 distributor to an old gm coil. where do the two wires hook up to?

[cobalt327]

Substitute your coil for the one shown. Red wire to "+" side of coil, black wire to "-" side of coil.

[oldred]

This is an example of a bit of controversy in a couple of other threads lately. He said he wanted to wire this thing to an old GM coil (I am assuming non HEI) and if so that very well may not work. In all likelihood the original GM coil had the resistor circuit and was only supposed to receive 8 to 9 volts running, a check with a Haynes or Chilton"s manual on testing the ignition circuit should confirm this, and using a full 12 volts would cause an overvoltage on the factory coil leading to very short coil life. Almost all high performance after market coils are wound for a full 12 volts for the sake of wiring simplicity but usually will fire sufficiently at lower voltages so that is not normally a problem on a well maintained engine which they assume the high performance installation will be used on. Before running a full 12 volts to the factory coil check the manual to see what the factory voltage is supposed to be and if it is less than 12 volts, probably it will be, then the original factory resistor wire needs to be used.

[cobalt327]

IF the coil is designed to be used w/a ballast/resistance wire, use one. You can use a wiring diagram from a pre-HEI GM ignition that shows the 12 V bypass coming from the starter "I" terminal.

[oldred]

A simple solution is to use a good after market high performance coil designed to use the full voltage, that would simplify the wiring and provide a better spark.