DISCLAIMER
I've done it before but I don't reccomend it. If your quarters are rusty you have nothing to lose but someone's gonna have to put new quarters on it eventually. You will lose a lot when you try to sell it .

IF YOU'RE GONNA DO IT ANYWAY
I sometimes used electrical conduit bent around a tire to shape it but for a professional looking job on a car like that 63 Nova I got an extra set of front fenders and cut off the flares. The right front flare fits the left rear opening. Left front on the right rear. When finished it looks like it came that way from the factory. It might retain a little more resale value.
AL