i'm guessing your axle ratios are either 5.38 or 4.27. either one will be fine for tires up to about 32" depending on tire type. 235/85x16 are 32" but a skinny tire that you could run. 32/11x15 would be harder because of their width added rolling resistance. your current tires are somewhere between 28 and 29", again depending ont type and manufacturer. with anything newer than your current engine, you should be able to handle it. imho.
1966 CJ5A, mods are coming
1966 Wagoneer, bone stock