Jim, are you going to run drums in the rear? I guess I'm just trying to figure out why you care about the original master cylinder. My Hydrotech came with a repro Corvette master from CPP on it.
Also if you are running a Saginaw type power steering pump and original style power steering you should be OK, but if you are running the newer style pumps and rack and pinion it gets a little more complicated. Rack and pinion needs lower pressure levels than the hydroboost needs to be effective, so if you make the hydroboost happy, you over pressurize the rack. I had my pump rebuilt (newer LS, Corvette type pump) by Lees to put out hydroboost flow rates, and am planning on using the Heidt's power steering valve to balance out the pressures so both are happy.
