Esteemed List, Okay, what did I do wrong, or which assumptions were wrong, modifying our 61 Fury to a dual system? I fitted a 69 Roadrunner master cylinder to the car, shortened the pedal-to-cylinder rod to fit, made the appropriate line mods, bled the system (yes, the master cylinder was bench bled before put on the car), and the pedal goes to the floor and it won't "pump up" stiff (even without the engine running). The car has original power brakes (bellows type). Assumptions I made: 1. Used manual 69 Roadrunner master cylinder. 2. Could put this in place of existing single cylinder without modifying bellows assembly. 3. Amount of fluid master cylinder would push is enough to actuate brakes. Yes, the air is out of the system, I'm sure of that. Any ideas on where I go from here? Do I actually have to install the total power brake system from a later 60's Mopar, including diaphram assembly to get it to work right, and remove the bellows? The single system is going back on the car this weekend. My wife is getting tired of me stealing her Blazer! Thanks! Bruce Clough 61 Newport - winter storage 61 Fury - daily driver up until this week!
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