HH56-You are confusing hydroboost with hydrovac, no lines from the P/S pump with hydrovac, just engine vacuum. Been doing a little research and found out that lots of Ford products of the era used hydrovac including the 57 T Bird because of lack of space under the hood. I think if enough leverage can be had from the existing pedal it would be an easy solution.
MikeG

Sorry- should have read through all the posts. Note to self, Engage brain befor picking up tools or fingering keyboard.

The setup I'm thinking of used a small master that would probably mount to the floor like the original. The hydrovac doesn't really care where you put it, just a matter of pedal ratio as you say and finding an unobtrusive spot to mount it. Hmmmmmmmmmm
MikeG

" A dual chamber master cylinder under the floor with a small diameter booster along for the ride"

How about a hydrovac unit similar to waht was used on medium duty juice brake trucks? My old IHC had a single chamber master on the firewall and a split system booster on the frame that was slaved to it.
MikeG

After doing some searching here I see that there are strong opinions about the Bendix treadlevac both pro and con. In the event that the unit on my 53 Patrician is toast is there a viable alternative?
Thanks