[442]

OK so i own a 72 olds 442 which i recentley did a brake overhaul on im running kore 3 kit Z06 brake calipers all the way around 6 piston 4 piston. I purchased a tuff stuff 9 inch dual diaphram booster and a wilwood tandam master cylinder 1" bore. I recentley installed everything including new brake lines I also gutted the factory combonation valve and use as a distribution block and installed a summit prop valve to rears. First problem i ran into is when bolting master to booster the booster rod pushes slighty against the master and compresses master piston slighty. Sencond i have excellent brake pressure to the fronts but absolutley zero brake pressure to the rears. ive bench bled master and pumped the brakes to bleed lines. seems like the fluid wont go down in the master for the rears no matter how much i try to pump n bleed. i need major help please

Thanks in advance