You know that if you rebuild the original brakes proper they'll stop your truck no problem. They really do have good brakes.
Now, if you are tossing all the original stuff out to build a hot rod then I'd go with discs myself, but any dofuss can do that. It takes discipline and talent to make an original run.
I've thought about the T5 but there are 3.55 gear sets avaiable that can get you there as well without major changes.
