Built In Ballast Resistor In Ignition Coil

Sounds like the run side of your ignition is dead.
Could be the switch or the wiring either one, and Del can tell you all the connections and where to test.
He loves that stuff.

It might sound like I'm getting annoyed with him and abodyjoe, but i'm not at all.
I like to think we all have a pretty good relationship. (I just like to tease Del a little here and there all in fun)
They have a good point in making sure the switching and wiring is ok first.
You will need that ign run side to work, because it makes a convienient source for power for the HEI coil. :-)