If you are worried about it I would maybe look into spraying lizard skin on it, they have one that is a ceramic coating for heat and one for sound deadening. Probably what will be going on my firewall and floor pan. I could almost fit a blower on the top of my big block and still close the hood so I don't see paint issues on the hood because of heat ever being a problem on a 40, my brothers car has no paint issues on the hood from heat with a 455 Buick and it was finished almost 20 years ago.