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Dual master cylinder ?
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Coronet 59
Posted 2017-06-10 5:31 PM (#541908)
Subject: Dual master cylinder ?



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Location: Eringsboda/Blekinge/Sweden
Hi, I'm converting my wifes 58 New Yorker to disc brakes, and wondering if there's a dual master cylinder that fits straight on the firewall and fits under the brake booster, 392 so the valve cover takes a lot of space to, somebody say a mc from a 67-70 A body will fit, anybody know if i't will ? Best regards/ Magnus.
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56D500boy
Posted 2017-06-10 7:55 PM (#541911 - in reply to #541908)
Subject: RE: Dual master cylinder ?



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Coronet 59 - 2017-06-10 5:31 PM
Hi, I'm converting my wifes 58 New Yorker to disc brakes, and wondering if there's a dual master cylinder that fits straight on the firewall and fits under the brake booster, 392 so the valve cover takes a lot of space to, somebody say a mc from a 67-70 A body will fit, anybody know if i't will ? Best regards/ Magnus.


I think you will want a disc/drum dual MC not a drum/drum dual MC if you are going discs on the front.

Have a look at this thread to get you going:

http://www.forwardlook.net/forums/forums/thread-view.asp?tid=59648&...

I think you will want a disc/drum dual MC.

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KcImperial
Posted 2017-06-10 7:57 PM (#541912 - in reply to #541908)
Subject: Re: Dual master cylinder ?



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The 67-70 dual chamber 'drum brake' master cylinder will fit. It's very tight and just barely clears the hemi valve cover. That's what was used with the AAJ disc brake kit (at least the last one I bought anyway)
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mstrug
Posted 2017-06-10 10:09 PM (#541918 - in reply to #541908)
Subject: Re: Dual master cylinder ?



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A master with a remote twin tank is a possibility too:

http://www.forwardlook.net/forums/forums/thread-view.asp?tid=64683&...





(remotemastercyl1.jpg)



Attachments
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Attachments remotemastercyl1.jpg (157KB - 157 downloads)
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rebel
Posted 2017-06-11 7:35 PM (#541954 - in reply to #541918)
Subject: Re: Dual master cylinder ?


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I attempted to do the AAJ kit and could not find a master cylinder to clear the spark plug wire cover on my 58 N/Y'er wagon. I even milled a tapered spacer to tilt up the M/C but it still would not clear. Even tried grinding down the "rib" on the m/c to no avail. I think part of the problem was all new motor mounts and transmission mount raised the engine by approx. 3/8". Just enough to cause the engine to fit the m/c. I talked to Rodger at AAJ and he confirmed that some people have this issue. I decided to keep everything stock so I went back to the drum brakes, with all new components, which work fine when everything is adjusted properly. I also think that going back to the old asbestos brake linings helps tremendously. I can get all four tires to slide, if I have too. If I hadn't decided to keep stock, I would have gone with the remote reservoir system.
Bob
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Coronet 59
Posted 2017-06-12 3:57 AM (#541966 - in reply to #541908)
Subject: Re: Dual master cylinder ?



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Thanks for the tips guys :-)
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57chizler
Posted 2017-06-12 1:08 PM (#541982 - in reply to #541954)
Subject: Re: Dual master cylinder ?



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I've often thought one could fabricate an adapter to move the MC over towards the fender to clear the Hemi valve cover like the factory did on the Hemi A-bodies in the sixties. Pushrod alignment is compensated by moving the pushrod to the other side of the pedal.
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