Would any of you fellas know on a 56 GMC shortbed stepside, the exact measurements of the carraige bolts for the strips and the bed to frame. I want to do stainless and just can't see paying the exhorbitant prices on the available kits..and they don't even come with all stainless parts either..most are just the bolt stainless.let me know if any of you guys would know that, thanks