On '60-'66 Chevy trucks, if you are running a single chamber master cylinder forward of your power brake booster, you can remove the booster from the fire wall and install a pedal/plunger from a factory manual brake setup. In essence converting it from power brakes to manual brakes. By doing so, you don't need to break into the system, thus bleeding is not required.
Since you are selling the truck, you may want to keep the factory power brake booster, even if it needs a rebuild. I see them fetching a pretty penny on eBay, from time to time. In fact, I purchase a factory rebuild kit and a complete NOS power brake booster assembly, complete with hardward and factory installation instructions on eBay a short time ago.
I have installed the factory power brake booster on several of my '64-'66 Chevy trucks to complete the power brake conversion. Again, this will only work if you are running a single chamber master cylinder that does not require vacuum or boost for the clutch.
