Rear wheel dimensions on 34 Ford?

I would like to know some nice rear wheel dimensions on 34 Ford, larger than 15" rims.

the backspacing for like a 8" wheel? etc?

A good answer pretty much requiers a little more data in the question. Fendered or fenderless? What dimension(s) are you looking for? Diameter? Anything from 16" to 20" would probably work with the right tire. Width? Anything from 6 to 12 would work with the right tire and fenders. Backspacing? Nobody can answer that one without knowing a lot of dimensions about your rear axle, body and fenders.

what axel you use would change your backspacing etc. Im building a 1933 ford 3 window coupe (steel) but I could give you some of my meassurements off my car.
I need to order my back wheels still.

my body is not tubbed or anything. I think the widest wheel im going to be able to run is a 8" with fenders.

I could send pics or meassurements. I have had to do a lot of work getting doors to line up etc. Im still not 100% done but im getting close. The 3 window body has been pretty challenging to line up compared to a five body I worked on.