I have never had a problem w/ used ones, but I soak them w/ wd 40 or a rust penetrant before removal. I have (slightly) rebent some to go on a slightly larger dana 60 from an 8 3/4 and ran them on a 750 h.p. hemi superstocker w/ no problem used nuts and all. Just take care of them taking them off, and make sure their not bad to start with. Have never experienced any twisting , If I did I`d replace them .