Can someone clue me in on a problem that I suspect others have experienced before?

I have a 69 AMX and I recently installed a new electronic ignition system. In the process, I also cleaned up some of the wiring in the engine compartment that was looking pretty bad. After completing all this, when I attempted to start her up, the starter continued to spin.

I first suspected that maybe the ignition switch wasn't disengaging, but after trying a remote starter switch it didn't solve the problem. As soon as you start the thing, the engine fires off, but the solenoid never disengages the starter.

Is it possible that I've inadvertently replaced a piece of resistance wire in the starter circuit that was needed?

I'm not sure how to proceed.

Thanks.