I am sure this has already been covered on here, but I don't have time to look at the moment. What is the wheel size and type that can be used on the TT02?

I am about to buy one for a local club race thing we have going on here local, but want to build my own variant based off a 1960's 70's style nascar.
The first body I am going to go with is the Parma 61 Impala
It would be awesome if I could find some "steel wheels" like they actually used back in the day. Anyone know of anything close?