MuuMuu101's 68 Dart, A Learning Process...

To answer a few of your question I used mp master cylinder adpter plate with an 85 5th Ave mc and the stock manual brake push rod. Just don't forget the push rod keeper bushing. I would build a reinforcement plated that goes on the back side of the firewall so that it leaves the mc in the stock location and include new studs on it then weld up them holes to the reinforcement plate for added strength. I notice my firewall flexes when we were bleeding the brakes.