Stop in for a cup of coffee

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I don't like to tell people what to do, especially when a manufacturer is supplying a system.
What I can say is that most factory disk brake systems have a larger resevoir for the caliper pistons. Unlike a drum brake's wheel cylinder, as the pad linings wear the caliper pistons use signifcantly more fluid to backfill the space.
I used a converted drum brake master for a at least a decade with no issues. Just explaining why the factroy added a larger resevoir. Up until '67, Chrysler stacked additional resevoir capacity on top of the standard master.

My point was not to toss the master cylinder you have. Even if it needs bore sleeve it may be worth something.

"Mastershake" on Moparts wrote an article on correct master cylinder castings and part numbers, back when he worked for big brake company. He's made some updates and corrections since it originally came out but still a good starting point. I *think* the pdf version has the corrections.
Moparts - Members In Print, Brad Schroeder "Pumping Points", Mopar Action (jpgs)
http://www.moparts.org/Tech/MoparAction/Master_Cylinder.pdf

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View attachment 1715924290

Thanks... I always like getting feedback so don't hold back. It's data points for decisions.

I agree in what you mention about reservoir size and disc/drum combinations. I'll go with the "system" package and see what happens I suppose. Figure I'll give it a chance to be correct

What's interesting is that the old one was with the car having drums all the way around....
 
I’m not sure but that may be a Gm style one. Lots of conversion kits use GM style disc masters

I've noticed that these guys seem to be about the only ones selling "kits" regardless of the outside packaging.

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I've noticed that these guys seem to be about the only ones selling "kits" regardless of the outside packaging.

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Probably the only guys that have them in stock.

so the kit that came from speedway, for the mustang II spindles , uses Ford Factory Maverick rotors, Ford Caliber brackets, an “adapter”(which is just a bushing) and GM G body disc calibers and pads.
 
What's interesting is that the old one was with the car having drums all the way around....
That is an unusual twist.
Functionally, if the bore diameter is the same as the drum, the stroke will be very close, and the only difference will be a residual valve for the drums.
The residual valve keeps the wheel cylinders from retracting too far as well keeping air out of the lines.
page 4 of 1967 Chrysler Dual Hydraulic Brake System from the Master Technicians Service Conference
page 5 of 1967 Chrysler Dual Hydraulic Brake System from the Master Technicians Service Conference

(to flip through the pages, manually type the page number into the URL. Someone goofed and loaded the pages to a usrl with the P in Page capitalized, but made the links to URLs wut ha small p in page. )
 
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Rain stopped. Helped some dude unload 2 of every animal in the back yard. After they cleared out, I cleaned up poop, mowed the grass and cut out some more roots. Got a nice pile going…

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Good Morning everyone. I hope all is well. Supposed to be the start of our warm up. Really windy this AM. I ordered a new distributor and wires for the Demon (supposed to be here on Friday) and changed the brake lines on the daily car. What a pain. Some bubble flare, some double flare. Some metric, some standard. Just pick one at this point, I no longer care. Just keep one flavor. Yes it is 20 years old, and most is metric now, but I see it at work at times still also. Grrrrr
 
Morning warm here today mid 90's all week and then back to seasonal 70's weird but better than cold and snow.
I guess on one hand we'll get to test the AC unit and make sure it's working properly.
 
70's and sunny here. We had 4" of rain Fri/Sat that is enough, the farmers are screwed cant get the crops in, Rain again Thursday.
 
70's and sunny here. We had 4" of rain Fri/Sat that is enough, the farmers are screwed cant get the crops in, Rain again Thursday.
We had that same system last week. We don't need any rain for awhile.
I'm going to mow this morning usually a two our job now with the slope and trees.
Also need to either hit the creek banks with the weed eater or push mower.
 
Good Morning All! Forecast says we get 60 degrees once, May 22nd. Whaaaa! I want to put the garden in, spread the dirt yesterday after last battle with stump (I won lol)

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