It would depend on what you're planning to do with the truck. Stock, Hot Rod, Driver with some updates?
That said, anything that is considered a "consumable item" should be replaced. This would be items such as brake linings, gaskets, door and glass seals, any rubber part, epsecially if cracking is appearant, filters if present, engine internals such as rings and bearing inserts, ignition parts, and possibly wiring and the battery. Other parts will require inspection first to determine condition, then a comparison of cost or restore/refurbishing vs. replacement has to be considered, as well as availabilty. Many on here prefer to try to save the original parts if they can, especially with some of the available replacement parts being questionable in quality (import junk).
