Question about brakes for a disc c20

[c20pickup]

I am converting my 70 c20 to four wheel discs, using a 71 front end and a newer aam1150 for a rear axle.. My question is, what master cylinder do i need to go with? Also a brake booster, will my stock booster work with a different master cylinder. Or do i use my factory master and boosyer and run a proportioning valve? Need some help here, this is a 3/4 ton so does bore size change on the master? Want something to bolt in without cutting and still use a vacuum booster