Jerry brings up an interesting option, hydroboost. Here is a link to a discussion about them....
https://www.stovebolt.com/ubbthreads...09913&page=all
https://www.amazon.com/Universal-Hyd.../dp/B074DZCB49

Another option I might pursue is to use a straight hydraulic system with no booster at all. You can jockey the brake pedal length and the master cylinder piston diameter to arrive at a system that works well.
https://www.jalopyjournal.com/forum/...ooster.757027/
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