I have a 63 that I switched from manual to the factory brake booster setup with a 72 truck dual MC and proportioning valve, all new. I,ve got good pedal but they feel like manual brakes. I've got good vacuum from the 350. What am I missing? In one of the forums I think I read that the pushrod from the pedal can be adjusted, could that be the answer? I'm open for any ideas. Thanks