Sounds like a good idea.
I would lean toward a bracket that mounts the assembly to the frame with a longish push rod going back to it from the pedals.

I like a hydroboost, but you should be fine with a vacuum booster, I just don't know which one would be best for you.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-