[dodgestang]

http://www.dodgestang.com/images/01mastercylinderinstall.jpg

Right next to the MC always seemd like a great place to plumb in a prop valve.

 

[dodgestang]

Did you bypass the distribution block for the rear lines and went from the master cylinder straight to the proportioning valve and then to the rear lines?

Rear line goes to prop, then to rear distribution block and not into the front distrubution block on the fender (as seen in picture). My SSBC kit came with a cap to block off the rear line output of the front distibution block.

 

[dodgestang]

If this was 65/6 distribution block there would be a large issue doing it that way

The 65/6 front distribution block is designed for jelly jar so all lines are interconnect with only a single input because of the single chamber MC

However, I see you have a 67 which I had not noticed before and the 67 is plumbed/works differnetly. Yes plumbing in the prop valve like that should be fine.

The rear line goes to a second distribution block located on the rear axle...that's why only one line leaves the front for the rear brakes.