OK, well the general consensus I've been getting is to do away with the residual pressure valves so thats what im going to do. I am going to plumb in a adjustable porportioning valve for the rear. Where would the best place to mount this be? Is it possible or safe to mount it in the cab (say under the dash or on the floor by the drivers seat)? Or is it best to just keep it out of the cab on the firewall or frame?

So nothing goes on the line to the front? Just a 1/4" line coming out of the master cylinder, which will go to a Tee mounted close by the driver front wheel. Coming out of the Tee will be two 1/4" lines, one looping around to the driver front wheel, and the other running along the front crossmember to the passenger front wheel.

The rear will have a 1/4" line coming out of the m/c which will go into a adjustable porportioning valve mounted somewhere via a reducer (1/4" down to 1/8"). Out of the apv the line will jump back up to 1/4 via another reducer (1/8" up to 1/4") and from there back to a Tee mounted on the rear axle. Out of the tee will be 2 3/16" lines going to the wheel cylinders. Correct?