before i traded up to my zr5 i had an 01 crew and ran 31x10.5 on stock wheel and 2inch bl with little t bar crank. and i have see several s10's with 31s and no lift. you should not have any problems with a 29x10.5
I started to say I have 9.5x30's and have no problems but then I reread your post and saw the 29x10.5 part. Never heard of that size before. I think you should be Ok. I really haven't done anything but the t-bar crank on mine and I really didn't crank it that much either.