Brandon, I know this is a definitive answer, but with the sizes you've chosen...18's or 19's, you have a plethora of choices and "rubber band" tires is null and void with the size of a Chevelle's wheel wells. Thinner side walls are only for sure if you're trying to squeeze 19 on a Kia or Honda Civic, not a Chevelle.
__________________
'68 C10 swb
'69 Camaro convertible
'72 Chevelle
|