The power brake booster is leaking vacuum and that makes the engine die when the brakes are applied. Replace brake booster.
Having ABS does not change how you bleed the brakes. Bleed them as you would if it did not have ABS.
Check you brake fluid and lines. It may be as simple as bleeding your brakes.
at a guess the brakes have still got air in the system and need bleeding properly
Does the truck have stock discs? Why would you want to switch the discs back to drums? Does the truck have stock discs? Why would you want to switch the discs back to drums?
yes
YES. That would be a direct swop.
A 1977 Chevy pickup truck would have rotors in front and drums in the rear
yes it will fit
That would be the 700R4
YES, That would be a direct swop.
if you want to adjust the emergency brake tension on a 1985 chevy scottsdale 10, you would have to get under the truck and take a look at your brakes. it may be that you would have to also look under the hood or ask a mechanic frien for assistance.
Pneumatic schematic in the air brakes in any type or build of truck all work in coordination with each other for smooth driving. The brakes would not be able to smoothly stop without them.