68 road runner with front disc brakes, adding power brake booster

[Tim Carlig]

I’m adding a power brake unit to my 68 roadrunner that has front disc brakes. What do I need in the form of a proportioning valve? Classic industries says I need a distribution valve AND A PROPORTIONING VALVE. Where would I mount these two valves if they’re needed?

 

[Doorkicker]

I'm fairly certain if you have a disk/drum master, all you need in the distribution block.

1967-70 Mopar B-body Distribution Block, Disc or Drum

 

[Tim Carlig]

I'm fairly certain if you have a disk/drum master, all you need in the distribution block.

1967-70 Mopar B-body Distribution Block, Disc or Drum

 

[R/T Boy 67]

If your car had drums originally, then all you need is a proportioning valve in the line to the rear brakes

 

[Tim Carlig]

What I’m looking for is IF my car ALREADY HAS the stock proportioning valve, is all I need to do is to ADD the distribution valve?

 

[R/T Boy 67]

This is a distribution block/pressure differential valve, Your car should already have one.

 

[Tim Carlig]

Then all I need to do is add the booster and no other valves? I kinda like to hear from someone who’s already done this.

 

[R/T Boy 67]

Adding a booster to a properly functioning manual brake system, (drum or disc) does not require any additional valves.

 

[Tim Carlig]

Thank you R/T Boy

 

[dfrazz]

I would check the vacuum to make sure it is enough to run power brakes too.

 

[Tim Carlig]

I would check the vacuum to make sure it is enough to run power brakes too.

Yep

 

[OKDart]

The Ramman says his repro dual booster works down to 10" vacuum, of course now the market is flooded with Chinese dual diaphragm boosters, who knows if they work as good. From about 5:00 to the end is where he says this: