Master cylinder for disc brake conversion

[gtx6970]

Is there a master cylinder for manual disc brakes in size 15/16 " bore size that looks kinda stock for a late 60s or early 70s B body . with Manual disc brakes ?
OR is there even an option besides the plastic bodied version like late models
Smallest I can find is 1-1/16" bore

 

[R/T Boy 67]

The cast iron ones are out there. The right stuff, mancini etc.

 

[DodgeBoy5150]

Force 10 sells an aluminum MC that works for disk or drum.
I just installed one on our Cordoba and it seems like a fantastic piece!
May not be what you are looking for but it's another option

 

[velocityss1985]

Read my post on Moparts - Cuda340

 

[gtx6970]

Read my post on Moparts - Cuda340

Got it.

Should have one later today.

 

[diesel_lv]

A believe a 73-75 A body power master cylinder will work. It is iron. I called Cass a few yrs ago to find out if there was a standard replacement out there for a disc/drum manual 15/16 n he said that should work. Will need the rubber retainer but otherwise should work w a manual brake push rod.

 

[Billccm]

Blast from the past when I completed my disc conversion.

 

[gtx6970]

A believe a 73-75 A body power master cylinder will work. It is iron. I called Cass a few yrs ago to find out if there was a standard replacement out there for a disc/drum manual 15/16 n he said that should work. Will need the rubber retainer but otherwise should work w a manual brake push rod.

Got one the other day.
I should have it bench bled and on the car this weekend

My original plan was convert it to power brakes.
But the vender I bought the kit from ( after a week of delayed response ) he finally got back to me saying part of the pkg was on backorder .
So I've decided to try and keep it manual disc brakes, ,just with a more OE stock looking master cylinder .

 

[gtx6970]

Got bench bled.
And on the car.

Much..MUCH better stopping ability now.
Car actually stops now without to much pedal effort required.


A good feeling finally when i drive it.
I will be much more comfortable when my girls take it for a spin.

 

[Nxcoupe]

Got bench bled.
And on the car.

Much..MUCH better stopping ability now.
Car actually stops now without to much pedal effort required.


A good feeling finally when i drive it.
I will be much more comfortable when my girls take it for a spin.

View attachment 1337828

So post a link for future posterity as to where you got this master?

 

[gtx6970]

So post a link for future posterity as to where you got this master?

https://www.oreillyauto.com/detail/c/select/brakes/brake-hydraulics/brake-master-cylinder/3bff094046ed/brakebest-select-brake-master-cylinder-new/ohh0/nmc11145/v/a/2379/automotive-car-1975-plymouth-duster?q=brake+master+cylinder&pos=0

 

[moparbud66]

No proportioning valve?

 

[diesel_lv]

No proportioning valve?

I've rarely seen one needed when using the correct distribution block. They didn't come w them stock.

 

[Nxcoupe]

No proportioning valve?

I'm going to do the phantomworks test and determine if an adjustable is needed. If it is, I'll stash it somewhere out if sight but accessible to adjust.

 

[gtx6970]

No proportioning valve?

Only the adjustable version for the rear brakes.

 

[velocityss1985]

You can also go with different size wheel cylinders in the rear if they are too grabby and the bias seems off. I believe 7/8" bore will help with that, but I am not positive on the size.

 

[Dragon Slayer]

Distribution block does nothing but allow multiple outputs from the input with a warning light for pressure loss on one side. Later in 71 and up a combination valve was used to provide the necessary distribution, warning light, proportioning and hold off if needed.

 

[69hotrod]

On these manuel disc brake master cylinders I been reading the push rod is different on a B body and A body car and the hole in the master cylinder is to .does anybody know anything about this ?