I changed out the drum for disc brakes on front and kept the drums on the back. Got a new master cylinder with booster and portion valve setup from Classic. I bench bled the clyinder several times and the lines several times and still don't have good brakes. When first pushing the pedal down I feel some braking but as the pedal goes down it looses power and have to push very hard to get any braking. The pedal also does not pump up to a solid feel with the engine off. The vacum is 12-15 lbs. After the brakes are working it is off to the body shop and then paint. Any suggestions and help is needed and welcome. Thanks for all or any ideas.