[olddog]

The control modual tested good. I had them run it 5 time, which got it pretty darn hot. It tested good all 5 times.

My ignition is Mallory distributor (that says direct OEM replacement) and a Mallory Promaster E Series Coil. Nothing else in the system.

Since it only happens when it is hot under the hood, I have assumed something electrical is breaking down. A local guy, who does a lot of auto electrical work, suggested putting the coil in an oven for a half hour and then testing it with an ohm meter.