15 x 7s, what size would you run on a 68 four door dart ?

the stock 7.25" in my duster is 57 1/8".

YJ being 58" opens up more possibilities, if I can find a rear from one. TJ's are easier to find. do you know if the TJ's are the same width as a YJ rear?
I do not honestly know but can actually find out- I have 11 jeeps, and my TJ is my daily driver, but I would have to have the rear tires off it- I don't have a spare rear end for that laying around- I bought the jeep cheap because the 35 was wrecked, but got another one off Oahu, been driving it since 2017. I am pretty sure the TJs are wider.