Brake problem

[ground hugger]

Hi
Ive replaced all the pipes 72 model new rear wheel cylinders and master cylinder.
The front brakes have blead ok but the rears ,no fluid getting through.Tryed bleeding the brake pressure regulater and once again no fluid.The pedal goes half way down and its solid and locks the front brakes up ok.Ive got it jacked up at the moment with all wheels removed
just to make it easier to do........Any ideas whats wrong please....Dave

 

[ground hugger]

Sorted
Ive just unbolted the pressure regulator and pulled it down.The bleed pipe I'd connected was still on with the bleed nipple open.when I pulled it down air shot down the tube I must have got the van at an angle so as the regulator had shut off the rear brakes .
Thinking about it this can't be right :? The vans about a foot lower at the front with the way ive jacked it up and the slope of the drive.So this says to me if Im driving down a hill the back brakes don't work :shock: Some thing doesn't add up right or am i missing the point here.Can some one put me on the right track here.......Dave