L77F85

i would like to convert my 65 F85 power drums to front disc. i pulled a complete disc brake assembly... including proportioning valve & distribution block from a power disc 70 El camino. i would like to delete the power booster & use a manual master cylinder for my disc brakes. my questions are...

1) where do i get a repro or rebuilt master cylinder for manual disc brakes? does anyone have part #'s for them? i tried looking on rockauto but all i saw was power brake master cylinders.

2) i've already rebuilt the 1970 power disc brake proportioning valve & distribution block would i still be able to use them with the disc brake set up even if i convert to manual disc?

thanks in advance