So I was at the pick n pull and found a set of headers on a 350 and snatched them up right away before realizing one critical point: these were on an '88+ model, headman model 69440. Is there any interferance frame wise or other interferance that will keep me from installing these? I am about half done sand blasting them to prep for paint, and am wondering if I should just sell them or if they will fit. Thanks!