I used a hydrobooster and MC under the floor of mine. At the time I cut and welded the stock pedal bracket to adapt the hydrobooster. Had I realized it back then it would have been quite simple to leave the stock pedal bracket alone. Them make a bracket and mount it all further back on the frame with a long tubular(stiff) pushrod to reach the pedal.
If you'll have power steering (or even if not) hydroboost is a very nice way to go. Very small and quite strong, makes for great brakes.
