Aug 23, 2023. Brake Booster/Master Cylinder Bracket Update - Well, as suspected, we were able to pull the bracket back near the original shape intended after it sprung cutting it while welding the gap left by cutting the wedge out. Also trimmed an inch off the back end. I mocked it up again tonight to see how it fit. Picture 1 shows from above. I rigged up a piece of wire between the rod and brake pedal to get a more confident feeling of the clearance. Picture 2 shows the clearance which measures about a 1/4". Picture 3 is from the passengers side and picture 4 shows how the bracket now fits to the bottom of the frame. Will have to grind off the overlap. Picture 5 shows how high the booster is above the top of the frame. Measures at 5/8".
All in all, I'm calling this proof of concept! Was hoping for a bit more than a 1/4" clearance, but I can either put washers as spacers to move the bracket out, or angle the bracket slightly so the front end is a bit higher. Both methods take the rod away from straight, so I think I'll angle the bracket, but will put the master cylinder on first to see how it's affected. I can also get another 1/8" to 3/16" clearance by extending the rod by using a coupling on the threaded piece attached to the booster and running ready rod over the transmission bracket.
I'll drill the holes in the bracket and mock it up to the frame again to mark hole centers on the frame, and then drill the frame. I'll also mark the booster bracket holes for drilling on the next mock up. Will post final pics when I'm done, but probably won't be for a week or so.
If anyone sees an issue with the plan, please comment. Like a 1/4" clearance not being enough, issues with the master cylinder potentially being slightly out of level, etc.