Thanks for the tips. Swapped out both the ignition module and ballast resistor. The engine started no problem . Guess I'll be having those spares in the trunk, you never know the day ;)Could be any one of the components. Ballast is easiest to check: just jump across it with a wire. I believe there have been some complaints about the reliability of the Proform kits. There's a pretty good chance that the module has failed. Can't overlook the pickup in the distributor or a simple connector problem either.
The easiest way to troubleshoot that system is to substitute known good components until it starts, otherwise you need an oscilloscope to properly test everything.
Hard to say but I will guess a wire for either the ac compressor or electric thermostatic choke??
Starting in 1970, the cars built with the California emission package had an electrical connection to the vacuum advance on the distributor, this was to limit the amount of advance under certain conditions, mostly when the engine was cold. That is probably what the connection is for. If the vehicle did not have the CA package, the connection was not used.