My update:

Right now I am still starting this car with a push button switch in the cabin. I just ran jumper wires off the solenoid. It is a solution, but I would prefer to get back on the ignition switch itself.

Regarding this response: There is not +12V at the blue/yellow lead that connects to the solenoid, so I likely do have a break somewhere. I recall when I cleaned the oil breather box that I had to "muscle" the cable harness out of the way to get the box out. I may have broken a wire then.

I could not locate the black plug referenced in this response. Must be that the 240 and 740 differ at this point in the wiring. I did locate the pink wire and black plug referenced in the next response, but found that this lead was +12V all the time, not just when in the III position on the ignition switch. ????

I could now use the color codes for the wires at the point where the cable harness connects to the plugs in the far right corner of the engine bay against the firewall. There are two large plugs and three small plugs located here. There is a blue/yellow" lead is here coming from the engine side of the harness and on one of the larger plugs. When I tried to run a jumper from that lead to the solenoid it did not solve the problem.

Any more ideas?

I appreciate the help!