Is there any good reason not to do this? I have a 14 bolt from a one ton that I am putting under my 91 K5. The ubolts I grabbed from the junkyard seemed like a good thing to grab at the same time. The spring pack must have been much thicker than the 4 leaves I am using without an overload. I was gonna buy new ubolts but thought I could at least try running these stock ones with threads cut further down. Any objections? Travis BTW, there are already rolled threads on there. Hint, hint.