OK, I got the thing going. I found the pigtail plug in for the switch in the wiring harness, and pulled it out a little so I could cut it and splice the wires together. To my surprise, the connector with 2 yellow wires was looped together! One wire, was attached to both terminals on the plug. The wires were twisted together, and were taped into the harness! The original clutch pedal switch may have been plugged into the terminal, but the terminal was looped back to itself and only attached to the wiring harness by electrical tape! That was fun....

So my issue was, someone added their own "safety device". The yellow wire in the harness was cut, and had a white wire connected to one end, and a purple wire connected to the other end. Both the white and the purple wires were attached to a connector screwed to the bottom of the dash. The problem was, nothing was connected to that connector. After I repaired the brake line and fuel tank straps, I did a major vacuum job inside the truck. That vacuuming effort must have dislodged a wire that was in that connector and I probably vacuumed it up with all the other junk that was on the floor. I cut the added wires off and reconnected the yellow wire back together, and the truck now starts like it should. Gene