How hot can aluminum heads get before they warp?

[MiracleMax]

Hmmm... the radiator and water pump seems up to snuff? the pump especially, since the Edelbrock pumps increase pressure and even out coolant flow into the engine. The benefit there is higher block pressures squeeze out air pockets and raise the boiling point of coolant inside the block (funny huh, every pound of pressure you increase the system raises boiling point by 2 degrees I beleive, and since block pressures are typically higher than in the rest of the system the boiling point is even higher).

My guess (if everything is alright engine pump and radiator wise) your electric fan is letting you down