1955 chevy wheel size

I have a set of 15x8 rally wheels 4'' back space. Willthese fit on my 1955 chevy. All supension is stock. What tires? Any help out there,
Thanks Jim

 

They might, or they might not, fit on the rear. They'd be kind of wide for the front. On the rear, you might have trouble putting them on the car, even if they fit in the fenderwell, just because the wheel opening is so small.

255/70 or 275/60 might barely fit, smaller tires would be more likely to fit.

Don't be surprised if you need to do a little sheet metal modification to get them in.