[roger1]

Originally Posted by HoovDaddy

Okay, refresh my memory. I might be wrong, but I think I remember changing the starter field coil from a 2 coil to a 4 coil for heat issues when I was a tech back then.

My first new car was a '71 Z28 and quite often it would not crank. Took it in under warranty several times and they never figured it out. Fortunately, it was a 4 speed, so I could push start as long as a friend was with me. I ended up making a jumper wire to go from the purple wire to the battery so I could start it myself. Never figured out the problem.

I've read that from retired mechanics before too. I hadn't heard 2 coil to 4 coil but was that the difference between the starters that used the copper spacer in the starter to solenoid connection and the ones that did not use the spacer? I'm guessing so.
I do know that I still had the heat problem back in the day with my Camaro (with headers) even when I changed to a starter that used the spacer.