Vintage Thunderbird Club International

I am looking to swap out my stock steel wheels for 15" custom wheels. I don't want big gangster rims or crazy chrome, just a 60s street racer look. I like American Racing Salt Flat Specials. Anyone know what tire and backspacing will fit on my stock 55 TBird?

If you go to page 3, titled My 1956 ford thunderbird, greetings from Texas. He has pictures and sizes that might help you figure out what will fit even though there probably bigger than what you would use.