70 to 71 Lincoln and other mid seventies fords used a 15" Steel Wheel that holds a '57 Ford Dog Dish.I'm having a set of Lincoln wheels powdercoated gloss black this week to use as rollers on my Courier.
You can use a 255 tire in the rear easily without any mods and up to a 275/60 15 if you roll the fenderlip and do a little clearancing on a '57 ford You need to jack one side up at a time, with the jack on the frame infront of the leaf spring mount to change rear wheels with a really wide tire.
A 255 tire fits fairly easy on a 57 bird as well, with just a little folding, clearancing and tossing the skirts. I have a 275/60/17 on the back of my bird, but I had to massage a bunch of stuff to make it work. It was worth it to me as it looks cool.