Electronic Ign. Control Unit (ECU) Heat condition

All,
Wanted to get a follow-up to all who have contributed. SUMMARY: Problem was/is my Neutral Safety Switch.
MEASUREMENTS: With a friend's help, We pulled the NSS wire off its Ignition Relay connection and checked voltage btwn it and ground. COLD in Neutral = 0 Volts; HOT in Neutral = ~11 Volts. So...when it was hot and I turned the key, I was putting ~11-12 volts across both sides of the Ign. Relay and hence it would not close.
SOLUTION: I have simply taken the NSS out of the equation and placed a small jumper wire from the NSS lug on the Ign. Relay directly to ground. Now the car will start (Hot or Cold) in any gear. It still cranks slowly when hot (though I have a heat shield on the starter and wrapped the header pipes near the starter), but think I might just need a slight timing adjustment......
I also crawled under the car and tracked down what I think is the NSS (Circular electrical switch about 5/8' in diameter mounted just behind the small shift lever arm on the driver's side of the trans. case.) Wires from this switch lead up and over the transmission casing but I have not been able to see what they are connected to. They do seem to be connected somewhere (are not loose), but I need to get car on a lift to check further. Still not sure why this switch works correctly when cold, but not when car/trans was hot...Maybe there is some sort of adjustment? (FYI, my hot-start problems started after I had the trans. rebuilt at a local shop.)