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Manual Disc drum master cylinder. What I used

magvan

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I see people ask what master cylinder to use on a manual disc/drum conversion and here is what I used on my 67 coronet rt.
Car was factory manual 11x3 front 11x2.5 rear drums. I went with the 11.9" rotors (slotted) with 1971 coronet calipers (pin mount)
For the master I went with a bendix 15/16" bore manual disc/drum from a early/mid 70s A body. All the lines were plug and play. The pedal travel and pedal pressure is excellent. Honestly I can't tell the difference in pedal pressure or travel than what it had before. But way better consistent braking than the drums that slowed down and faded after a couple of good stops. Now I need to relearn to drive my car and wait a little longer before I get on the brakes
 
I like your recipe. I've been on the fence for many weeks trying to decide what to do with my 68 Road Runner. I have 11 inch drums (heavy duty brakes as the service manual describes), and was thinking about the Dr Diff kit, or trying the musclecarbrakes.com solution.

You did not mention the proportioning valve?

Did you just piece together your own conversion? Where did you source all of the parts?

Thanks for this information.
 
Got a part number for that master?
 
I had a hard time finding the right MC to use. Most all disc/drum mc's I could find were for power brake applications. I ended up with a dr. Diff mc. It came with a mounting bracket that attaches to the stock location. It worked like a charm, same pushrod and everything.

The only issue I had was that mounting bracket is about 1/4 thick and dropped the pedal just enough so that the taillight switch needed adjusting. Otherwise the brake lights stayed on.

I'd go the same route if I had to do over.
 
Did you use the Dr Diff porpotioning block?
 
I bought a brake line set from Fine Lines and the prop valve was part of the set.
 
I put my own kit together.
Regular 73 a body spindles but I had to get new ones from the ream man, couldn't turn up any originals.
Caliper brackets were from a 79 cordoba.
I used the pv6070mop proportion valve but did not install the separate metering valve.
Calipers are mounted towards the rear and I used 74 b body hoses.

I still have the box the master came in. I'll get the part # off if it.
 
master cylinder is bendix 11571
i bought it at rockauto and was listed for manual disc/drum 15/16" bore.
before installing it i measured the push rod hole, and it is exactly the same depth as the 1967 manual drum/drum master. i also measured the brake pedal height before and it is the same too
 
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