John
From my readings of various posts regarding removal of the boosters, the opinions on pedal effort and feel vary; some like the result and some don't. Obviously it is hard to describe, and opinions vary. Some have made the change, and then re-installed the boosters. Some report better feel and reasonable pedal effort.
Gerry Minors (gerrym) had a very nice thread/post recently on his efforts to remove his boosters and replace the master cylinder with an available smaller diameter dual circuit replacement unit. I don't know if he got it on the road yet, but definitely worth a search to read that one over. General limitation with the available replacement dual circuit master cylinders is the outlet ports are on the wrong side of the master cylinder so some re-piping is required.
For a very good illustration of the Federal two booster set-up compared to the single booster set-up, check out the parts manual on Ray's site at rdent.com. Under Plus 2 manual, Brakes, Bundy Piping he has the same illustration I have in my parts book. It can be a bit confusing at first as it shows both systems in one illustration, but it is all there. Other pages show the different pedal boxes, etc.
http://rdent.com/manuals/index.htmlFor what it is worth, I considered this modification to my car, which is a LHD Federal model, 50-2181. I decided to get it running using the two booster set-up first, and will consider this change at a later date depending on how I like the stock set-up. Both my boosters appear to be working well and were re-built prior to me picking the car up. Prior to my on-going body off re-build, I experienced difficulty locking the brakes even with mashing the pedal full force, so not sure.
Main reason I saw for removing the boosters was to provide more room under the hood. I was unable to mount a replacement side tank wide radiator because the top inlet pipe fouls the front booster. If I experience cooling issues with the stock radiator I will consider brake mods to accomodate the radiator.