The bushings are available from energy suspension for the leaf springs - those are stock springs. Oregon cam grinders or schneider racing cams can grind you a cam for just about anything you want to do to a 2.6. Put it with a DG header (available on the site) or a doug thorley header, and a weber 32/36 carb, with a 2 1/4 free flowing exhaust will wake the truck right up.