Jason,You need to purchase a shop manual for your'64 Fleetside. This will help you in answering a lot of your mechanicl questions. In the case of the throwout bearing there should be some kind of nut and threaded rod combination at the bearing fork out the side of the clutch housing.Play around with the adjustment and see(learn) what happens. You may also need to adjust any shift arms you have.You've been doing a ton of work on your truck and it can get frustrating at times.Hang in there.
