[Mike C]

I read a lot about mid-year big block Corvettes and cooling. The reality is MORE advance makes an engine run cooler.

Corvettes run hot. High compression, big cam big blocks run hot. You can mitigate that by getting your initial and mechanical advance curve to where it is the appropriate max advance for you and then you hook up the vacuum to MANIFOLD source which gives you tons more advance at idle which should help keep temp down as well as make for a smoother idle.

This is just ONE aspect of a car running hot and making sure a lot of the other hard components are in good shape as suggested above is mandatory as well.