As for master cyl.
I'm putting a 350 & 4speed from a 1970 1-ton into a 45 1-1/2 ton. Of course, the newer bell doesn't have mount points for the pedals.
But, I took the pedals and hanger from the 1970 and they fit up under my old dash very nice. That puts the master cylindar up on the firewall. I am
running the clutch rod down through the hole where the clutch pedal used to be. It mates up with a new rocker that I have to build. This is turning out to be a lot easier than I expected.
JR