Which proportioning valve should I use??

This is the way I think I am leaning towards, could this setup be used with a line lock plumed inlint on the front brake line before the prop valve? Have your car been on the road with this setup??

I am not entirely sure about the line lock setup...I have used this current setup for a very short trip around the block. From just that little trip, It works great, I have good solid brake pedal, and the car stops nicely.