The proper way would to have it in a jig. if you put to much heat to it it will walk/bend. I've seen it done. i had an 8 3/4 dodge rear that was bent and was going to put a back brace on it. well the jig would not fit so i started welding getting it hot and it walked right over into spec. all was well then. just my thought. p.s if it does get out of wack you will go through bearings.