so, i just tried mounting my hi-lift with U-bolts, and its not tall enough for the holes to go to my roll bars and line up with the bolts... however, i put it on the wheel well (seeing as i am driving the unlimited with the extra cab space) and zip-tied it to the hard top bolt holes, its a PERFECT fit, the wheel well is supporting the weight and the zip-ties are holding it to the side, it seems to work well and it stays out of the way completely, only thing is if in need, i will have to cut the zip-ties, but that's what they r there for and i have plenty more, so i figured i would post this info, just in case anyone has similar issues for mounting their hi-lift!
i will be returning the U-bolts tomorrow... unless anyone wants them, i paid 20 something for the set, $15 to any club member, they are brand new, interior dimensions are 3 1/8", that will fit snug around roll bars with insulation, i have extra over sized washers to go with them... let me know!
thanks for the info kirk