In my opinion, ----"You'll be sorry". I had a 65 Mustang many, many, years ago, and when the tires wore out, I couldn't afford new ones. I went by a garage that sold tires, and a fellow offered me a set of bias ply tires for about 1/3 of the price of radials (which came on the car new). Being young and dumb, (as opposed to being old and dumb now) I took him up on the offer. The difference in ride and handling was absolutely incredible--WORSE, WORSE, WORSE!!!!---but---try it and see. I will be interested in your opinion of the difference.---Brian