Jerry,
Merry almost Christmas...I'm not sure on all the details but your starter solenoid should also have a 'R' terminal adjacent to the 'S' terminal that is key powered to engage the solenoid and spin the starter.
That 'R' terminal is powered during START only and can supply voltage to your ignition. This can be directly to the HEI, or probably through one of the contacts on the key switch, maybe a IGN-2 or something like that. This feature in the solenoid is called the ignition bypass, although your HEI will use full system voltage so there is no resistor to bypass.
So, to get net, some contact on your key switch..probably ON will power the ignition during RUN, and the bypass contact in the solenoid will power for that short period during START.
I hope this applies to whatever rig you have...good luck.
Stuart
