Ian...Before you go any farther, click on the link below, scroll down a little and look at the pictures. This M/C location looks fairly close to yours. The '32 in the pictures belongs to Dennis Lacy of The Early V8 Garage. Dennis and his dad engineer, build and sell these hydraulic brake conversion kits THAT WORK. Maybe you can get some ideas from the many detailed pictures of Dennis' own personal truck with their product installed. Maybe it's your pedal location that makes your bracket/situation look questionable. Just MAYBE, you're on the right track and I just can't see it from the limited pictures you've posted. Check out the link BELOW! DD
https://www.jalopyjournal.com/forum/...#post-11039172