There are many different choices.
One would be rebuild stock, the brakes really are quite good. IF you don't change the rear axle for a faster one then you won't be going fast any how, and should be fine with a stock system.
If you want to upgrade to a twin circuit system then a kit like sold by Chevy Duty is probably a good idea. It will be important to find a master cylinder that will work with your large wheel cylinders, as the one they sell in the kit is for a 1/2 ton.
I have gone a bit more extreme with the addition of disc brakes at all 4 corners and a hydrobooster that helps with the brakes using pressure from the power steering pump.
All depends on what you want to do with your truck,
By the way, and what is it you want to do???
Grigg
