I am working on my mother in-laws '68 RS/SS 396 4spd. The car had the big corvette brakes on the front from the factory and rear drum. She wants the widest wheel tire combo for front and rear without having to make any body or suspension mods. Preferably 15" torque thrust wheel. Any information would be appreciated. I remember last time I tried this, I had a hard time finding wheels that would fit and clear those huge calipers. Thank you in advance.