You won't like the way the car handles and rides on bias plys. I have used both and radials are far superior. But if you are willing to give that up to get the period look, that is your decision. But I have a feeling those fifties-style deuce roadsters with bias ply white walls are not driven seven hours at 75 mph to the Street Rod Nationals like mine is. As far as tires getting hot with less air pressure, you have to realize that the weight of the car makes a huge difference. That is the reason why those 4500 lb. SUV's were having trouble with Firestone tires failing at low pressures. Not all the blame could be put on the tires.