The block I was going to us for my car is already been bored to .030. The machinists says needs bore again. I have heard the 350 chevy will run hot at .060. Alot of race engines are bored to that, but they also don't have to sit in traffic an idle. I am building the car for long distance driving, not racing. Well maybe a little fun, but not full all out racing. I am limited on the size of radiator that will fit. There just isn't enough room to put in a monster. Will it overheat easier than an another chevy only bored to .030?