If all 4 wheels are in restorable condition I'd say that's a giveaway. As far as fitment issues are concerned, it seems in my experiences that you simply just have to try them first. It seems every car needs a different offset to fit properly, and even from car to car they're not always the same, i.e. a Z/28 will have less wheel weel clearance than an SS396 if they're sitting on their springs properly. 14"s sometimes rub on caliper brackets, but 15"s would definitely clear regular calipers, can't say on the 4 piston type. An 8" wheel is too wide for a Camaro IMO, even in 15". The extra wide lip on the front only further accentuates this. A first gen Camaro simply can't swallow as much wheel as the swoopy fenders of an eary 'Vette. What is the offset on these 15x8"s? How much wheel is on the front, i.e. outward of the mounting flange, or what's gonna stick past your rotors? I'm thinking a 15x8" will definitely rub in front on a Camaro, even with an E70 tire. Yenko used a 15x6" on an E-70 Wide Tread on his 69 Camaros and they look just right to me. I'd still probably grab em for that price though, never know when you might buy that Vette to put em on.