i ran 33s on my 4 cyl... the only problem was on the highway. i would start looking at upgrading your axle gears though to gain some power back i ran 4.88 gears which is generally too high for 33s, but on a 4 cyl it seemed just right
1994 yj stretched, locked and loaded - 6.0l vortec lq4, 4l60e, np231, Dana 44s 37" interco trxus m/t, 3.5" bds front leafs, double triangulated 4 link rear on xj front coils.
1997 ZJ limited - BONE stock
2003 tj - 4in skyjacker, 33" mickey thompsons
my on board alternator/welder write up
my tj 1/2 doors on a yj write up
RC vs BDS