I ran 285/75r16's with 3.73 gears and the 2.5L manual transmission, it brought teh suck! I mean it was drivable, you just had to floor it more than usual. I just did that for a few weeks while working out the kinks with my axle swap, then took it to a shop where they installed my 4.88 gears.
I drove for 6 months on 34" bias Swampers with 4.10 gears, it sucked but those tires were badass.
1995 YJ "Mabel", 2.5L Muncie SM465 np231j 4.88's HP30 Lockright JK 44 Detroit 33s CJ clip
Actually, it's pronounced "mill-e-wah-que" which is Algonquin for "the good land."