Here are a couple of pics with the pedal assembly and the masters mocked up. I might decide to go with the smaller format master cylinders which use the separate reservoirs....and the CV billet reservoirs, just because they look so much cooler than these.
Anyway, in case it helps anyone doing the same kind of thing...early in the process, and luckily, before any sparks flew, I found that, in order to position the whole shebang so that it would both clear the valve cover, AND allow the valve cover to be removed, that would make the brake pedal arm hit the column. Great.
So in order to fix that, I had to modify the brake pedal arm to put an offset into it, to move it about 3/4" toward the tunnel. Of course, this moved the two pedal pads further apart, but I don't think it's going to amount to much, in terms of driving the car.
I also still need to make a couple of supports to tie the pedal assembly into the metal directly above it.
The whole thing protrudes from the firewall by about 5.5"