Front Tire Size

Does that 15incher fit on your 72?
72s were sbp,
and there was never an oem sbp steel 15 made.
Center registers too were different.
And KH brakes require a specially shaped spider.
the 4" bs will want to get into the small BJ at full droop, or the BJ will want to tear the wheel balance weights off.So check carefully

Obviously it is possible, today, and since the early 2000s or so, to buy a specialty 15 incher to fit on the 72 hubs.

FWIW; 235/60-14s fit on 14 x 7 ET-IIs .They are 25.1 tall. I had to trim a wee bit of metal from the lowest part of the wheel openings at the front , to allow full lock cornering. I think those kidney bean slots were only 3.375 bs. I wanted as wide a track as I could get.