[Mohuska]

Well after many hours of thought and an equal number of hours of pulling things apart, I no longer have an overheating problem.

The source of my angst was a combination of a faulty temp sender (not the primary issue) and some significant air bubbles in the system.

I made some minor plumbing corrections (thanks Bill) and put a GM coolant bleeder valve in the top of the thermostat housing. After 4 sessions of burping, bleeding and filling, no more air!! What a PITA!

I ran my car hard this week when the outside temp was 104-106 and the car stayed at a comfortable 190-200 all the time. I tested several areas with the laser thermometer and everything was cool.

Thanks to everyone with their great ideas. I really appreciate it

Mike