i am helping a buddy of mine with his axle swap and we need to know that if we add vacuum boost to the factory 70 model manual master cylinder. will it work alright with the new 79 dana 44 twin piston calipers and disks. also is the factory distribution block going to work ok with this setup.

I put a HP 60 with discs under the front of my '67 F100, and it stops it real fast with the factory master cylinder in it. I'm running 36" TSLs and I can lock up all the brakes no problem on the hwy.

Without vacume boost? We might try that thanks.

No vacuum boost.