if the stock frame is ok WHY do a frame swap. just update the front & rear suspensions. there are lots of companies
(CLICK HERE) that sell just about any suspension kit u's ever want & the same goes for the rear (CLICK HERE). these will give u an idea what may be out there. also get a stret rod or truck magazine & it'll also have lots of parts places in it. u could also click on my vendors list at the bottom of my post & look through them.......joe