Well I've been slackin' on progress pics of this thing. I had "modelers block" last week but have been working my way through it now for the last few days. I was trying to figure out the whole brake system dilemma and I think I've finally got something started here. I found a master cylinder / power brake booster combo that is going to work. The problem is that the bottom of the power brake booster was hollow as seen from the bottom but the benefit here is that instead of being rounded on the bottom , it's flat. This is perfect in the fact that I cut the master cylinder from the booster and will rotate the master cylinder 180 degrees in order to mount the flat portion of the brake booster to the bottom of the cab floor. I also cut an L bracket out from some spare parts of another frame and drilled a hole in it for the booster to "mount" to.
Perhaps I could explain it better in photos. Here's the brake booster/ master cylinder assy: (sorry for the blurred image on the first pic)
Here is the brake booster and L bracket test fitted. I pinned the brake booster so that the master cylinder mount up to the booster would be a bit more solid. Looks like I'll be thinning that L bracket a bit to scale thickness as well.
While keeping in mind that my results aren't going to look exactly like it, this is what I'm going for but with a slightly longer rod and another stand off L bracket for a brake booster actuating rod guide that's coming soon:
