1966 Valiant - Power or manual disk brakes?

[SSVDP]

My ‘66 Valiant has manual Kelsey Hayes disk brakes. I want to install a dual master cylinder. I was wondering if I should go to power assist or not. And then what size master cylinder bore.
Let me know what your experience is.

or do I just order this?

More Information for RAYBESTOS MC36406

 

[Kendog 170]

That's the one with the correct 15/16 bore. Lets the pedal go down some unlike the hard pedal that the larger bore gives. I would use it on my 68 Dart. Don't know if 66 is different.

 

[halfafish]

There is a lot of personal preference here. A larger diameter MC gives shorter throw but a more firm pedal feel. Smaller diameter gives a longer pedal throw but less stiff. Opinions are all over the place but after reading a LOT I went with a 15/16 manual MC for the same car and same brakes.

I can't think why power brakes would be needed on an early A unless there was physical leg weakness that needed belp.

 

[Ricks70Duster340]

My ‘66 Valiant has manual Kelsey Hayes disk brakes. I want to install a dual master cylinder. I was wondering if I should go to power assist or not. And then what size master cylinder bore.
Let me know what your experience is.

or do I just order this?

More Information for RAYBESTOS MC36406

A lightweight car like that does not need power brakes. You have the disc up front, so you're good. I have manual brakes on my 70 Duster 340 and it works great without a lot of effort to stop. Besides that, I like simple!

 

[KosmicKuda]

The go to MC is a 73-75 A body power disc brake but run manually. If that Raybestos is for that application then you are good.
There is no need to run power brakes.

 

[Early a body]

I have kh on a 64 dart and 65 cuda and 65 valiant manual brakes. If you went to power the power( aftermarket kit) booster and mc is going to stick way out there in the engine compartment potentially getting in the way of access to certain things like valve covers steering column to steering box connection etc.
You really don't need power brakes on a valiant or dart or any early a they work great without power does not require major pedal pressure to stop the car.

But if you prefer see the advise above as I have seen many power brake conversation kits where the dang pedal goes all the way down to the floor board almost.
If you find a stock set up i do not think that will be the case. You would need a 67 on ward a body set up for stock .

 

[Dana67Dart]

The parts you don't add don't cause you no trouble! (C.C. Nance)

Stay with manual.

I drove a jeep liberty or the like rental car a few weeks past and the brakes were so touchy nearly tossed the passangers through the window.

I hear 60's dodge PBs are touchy too.