Ok, nm, i assumed yours was a 97-04'. A 7" universal booster should still be a direct bolt on tho. As to clearance i honestly don't know on the older bodystyles.
pick up any hot rod magazine off the news stand, off the top of my head i know of http://www.sachserodshop.com/links/index.html but i'm sure there are plenty other places to pick them up, google 7" universal booster.