No aftermarket lift availible, you'll either have to make your own or find a Napco truck/parts. If you do it like the Napco was done, that's roughly 7" of lift just doing the conversion. You might also be able to adapt the suspension components from a later 4x4, like a mid'70s-mid '80s Chevy, to your existing chassis. Take a look at Stacey Davids Sgt. Rock project, you might be able to get some ideas for doing the conversin from that.
