I'm working on this same plan for my '54 350. It has a 1-1/4 inch M/C original,and I found a M/C from a Chev/GMC one ton van is also 1-1/4 inch bore,but dual circuit,and the lines,when installed under floor,will be in the side facing the transmission. I'll have to get a universal proportioning valve and buy some brake lines. I'm going to try building my bracket first,but if it turns into too big of a cluster-kluge I'll have to but one. My Master Cylinder was hooked to a Hydro Boost,but it'd be a pain rigging a pump etc,so I'm running it w/o a booster for a while. Since the lines have to go back to a crossmember then forward again to where I split the front and rear brakes apart,if I get a booster that fits my app. all I'll have to do is move the M/C back enough to mount the booster and put a couple of "S" curves in the lines and I'm set.
Speed
