fuchs it?
 

Will 15x7 fuchs wheels fit on the rear of my 64 356C porsche?

I saw a C coupe a few years back with 16x7s i believe, all the way around. Can't give you any details though, only that he said finding the right tire manufacture was difficult, since each company has a slightly different profile, for the same sizes. To the best of my knowledge, he hand't rolled the fenders. The tires just barely tucked.

14x5.5 works great too, if your horsepower is still close to stock.