I'm curious on this as well, though I don't have a booster. Just put a T56 in my car and mounted the MC up high next to the brake MC. Flatened out the firewall and made a backing plate that mounts to the pedal box (thanks to 72BBSwinger for the design). Have some issues with my brake plumbing though since I have an older brake MC that's bigger than what 72BBSwinger had.