Need input on brake system design

[rat-on]

Hey guys; I'm getting ready to plumb the brake lines and need expertise opinions please. My roadster pickup weighs about 1000 pounds. I am using drum brakes front and rear, under floor manual tandem master cylinder from 68' Camaro application new from NAPA. I plan on installing a manual proportioning valve for the rear circut. My main concern is residual valves. Supposedly most of the stock production drum/drum master cylinders have them internally and none need to be added inline...........what is your experience out there? Thanks, Jim.

 

[DJ3100]

Using them won't cause a problem. Not using them might require that you add them later.
I used them on my '53 with the master under the floor and it all works fine. Don't know if I would have problems without them.

How did you get it to weigh only 1000 pounds? Aluminum engine block?

 

[HOT40ROD]

Usually I found that is the master cylinders is the same height or lower then the wheel cylinders you will need the inline residual valves.

If there not used I found that you will have to pump the brakes a couple of time to get them to work. Not something I want to do if I have to stop fast.

Repairing the workbench and back wall of your garage is not fun when you run into it with your 1941 ford. Don't ask

 

[rat-on]

Using them won't cause a problem. Not using them might require that you add them later.
I used them on my '53 with the master under the floor and it all works fine. Don't know if I would have problems without them.

How did you get it to weigh only 1000 pounds? Aluminum engine block?

I'm using a 350 pound chevy v6 coupled to a turbo 350 trans in a t bucket style car, not to much weight there. So as far as the '68 camaro master cylinder having internal residual vaves, how can that be confirmed for sure without disassembly?

 

[old lady's mad]

i hate to say this , but you could have your parts store call the a-1 cardone tech line and they should be able to answer that . they are the rebuilders for almost evrything . even reboxed stuff . if your not using a rebuilt unit dont tell them that . you just need the part #