As for master cylinder retrofit, seems typ is to use the C3 Corvette manual disk brake master cylinder (ca:1980) 1” bore, you can find a version with outlets on both sides which might make line routing easier than mine. I found it relatively easy to fab a bracket from a heavy duty L bracket found at my local builder supply. Welded a gusset in one side drilled it for master and mounted it to the existing master cyl bracket and tranny.
As for brake choice, each for his own situation: my truck was a mismatch from the PO of bendix on rear huck on front which drove my decisions, front cyls were pitted and orig master shot, pedal was very heavy. Putting the dual master and new everything inside the hucks, put a prop valve on the rears as they locked up quick in hard stop test, pedal still very very heavy. Seemed like the matchup/ balance of huck/ bendix was just not right. Just finished switch out to ‘54 front bendix brakes with all new cyls springs hardware drums studs etc, pedal is significantly lighter, very solid pedal with right amount travel, . It was not a cheap conversion even though bendix parts are a lot less expensive and very available. Got ‘54 backing plates and hubs from fellow ‘bolter, +$260. at machine shop + all new parts, not exactly cheap to complete but nothing is, I’m good with it. Each his own.
