manual to power brake conversion stick truck

[old Rusty C10]

My latest creation is a 74 stepside made out of parts that I had or came with the chasis or from my donor 79 c20
Heres the question

The cab I had was originally a manual brake cab. The reason I say this is because every one of the cabs ive seen with the power brake setup they have an extra couple of studs in the upper part of the mounting for the brake assemvbly . This cab does not.

My questions are as follows as I am havng problems finding the brake linkages
Can I just install the brake booster/master from the 79 into this truck and leave out the two top bolts?

I need to change the pedal assembly in this truck from a automatic to a 3 speed stick setup.. Will the linkages be different there for the brake pedal?
Lastly will I need to change the rotors calipers drums and rear brake assemblies because of the change of setup?
Pics of the donor truck and the build enclosed for review

Just for fun I have the original sticker from the truck that I have the complete drivetrain , chassis, and harness from and it is as follows
Model cc10703
Killarney green
Fleetisde pickup box
Manual Disc/drum brake
Heavy duty clutch
cloth seat trim
Slate green Vimyl int
Heavy duty rear spring
L6 engine 250 CID
Painted rear bumper