Hy handymanmac, I think that all you would need to do is install the power booster in front of your existing master cylinder. Corvettes had disc all around, hence no residual pressure valves built into their master cylinders, so they must be added when using with drum brakes. Do you currently have a problem with your rear brakes locking up when stopping? If not why do you feel an adjustable proportioning valve is required?
