Thanks for the link on the Holly/Weber carb jets, I'll check them out.

In the past few months, I have replaced the motor, water pump and distributor. I have installed a new three core radiator that barely fits into the 27-inch by 18-inch opening, so that makes a B210 radiator a very small toy beside it.

I do not use a thermostat but I do use a restrictor plate with a 3/4-inch hole. If I use a thermostat, it only puts the system closer to the boil over point.

The carb is the only thing that is still there from when all of my problems started, everything else is new.

I have been wrong on everything that I have replaced to keep it from overheating, the carb is the only thing left.

I have put over 400,000 miles in 1200s and built very high RPM motors so I do know the cars pretty well. I haven't changed the spark plug heat range yet either but I assume that is not the problem. Maybe it is and I will do that.

I am planning to go to my uncle's yard this weekend and get a late 80s Sentra throttle body FI system and try to install it. Maybe I can get this in over the weekend.

Mareo