Re: ZJ max tire size
30X9.5's will fit with minimal rubbing if the front sway bar is disconnected. If it's left connected, you could maybe stuff 31's, but it would definitely rub, and may hit the rear of the fenders.
2" BB - 31's, minimal rubbing
3.5" - 31's - no rubbing, 32's, rubbing
4.5" - 31's - lots o' flex, 32's maybe a little rubbing and will probably need to trim rear of fenders.
5.5" - 31's, 32's, 33's rubbing
6-6.5" - 33's with a little work
Largest yet - 36's on a crazy leaf spring conversion and 38's on a $50k Icelandic model.
'82 CJ-7/360/727/D300/M.O.R.E. shackles and lots of ideas!
Have you kissed your JEEP lately?