Not done yet or giving up on the three master cylinder situation yet. My car came with a dual circuit master cylinder, appeared to be a poorly modified Spitfire master cylinder. The pedals would not travel all the way forward. Once I get the body under control, and it is coming along, I can see what can be done with the three master cylinders. Good news is; I found and bought a small air conditioning evaporator assembly, that fits nicely on top of the passenger side foot box. Hopefully no massive modifications to have air conditioning in the car (I live in Arizona). Also a small AC compressor and 70 Amp alternator. Will probably have more energy designing engine mounting brackets for the AC compressor than fitting the AC unit......I hope.
Steve V. In Arizona