spray them with krohl oil or another wd40 type spray, then beat on em with a hammer to loosen them a little, hit the head of the bolt slightly to the side(yes im serious)
Thats what I was implying. A flip kit should have new U-bolts anyways. You're supposed to replace them every time you remove them anyway, since theyr're considered stretch bolts.
well i tried to heat with a torch and soaked it didnt work ,so im just gonna buy new bolts , and try to cut them out 2morrow,its just a bitch from that gas tank, thanks for the help