Looks like most suggestions are covered here. The obvious is to check the gauge first of all. Second decide how hot is too hot. 220 operating temp is fairly normal these days. Does it climb to 220 and stop there or will it continue to climb? Also one thing that gets overlooked a lot is ignition timing. When you say 36 I assume you mean its locked out at 36, which should be ok but might check that. Is the exhaust getting hot, as in the headers. That would be an indication of retarded timing for sure as would increased operating temps.