[bcrumpley]

A couple thoughts on this. Being that you are in Houston, I’d run 75% water/ 25% coolant along with Water Wetter. I would install a 180 degree thermostat and set my fan to come on around 185. Start cooling it before it’s up to 210 plus.

You say your engine is a 520 cubic inch FE. I don’t know what the bore is, but those cylinder walls must be pretty thin. Nothing you can do to change that, but these changes along with a fan that moves more air and optimal engine tuning might get you where you want to be.