The master cylinder DOES NOT have to be in the factory location. It can be moved back to an open space and a longer push rod used or it can be remote mounted ANYWHERE. If moved back you will need a new hole in the floor for a filler plug or just fill from underneath with a mirror and douche ball. For remote mount the factory mc line runs to a slave cylinder which moves the rod to the booster/mc. The remote unit can be in the bed, trunk, cab, anywhere. Look at a 1957 T-Bird, it has the mc on the firewall and the booster/mc on the left side of the radiator.
