[57tailgater]

I'll be watching this thread as I thought the port closest to the pushrod was for the front brakes and the other one was for the rear. This way pressure was applied to the front brakes prior to the rear so the rears don't lock up and spin you around. If you pull the master cylinder apart, there's a spring in between the plungers inside that allows this to happen. The block is a metering block to balance the pressures appropriately given the engineered application. If you're not getting your brakes to lock up or stop as quickly as they should, there's probably an issue with master cylinder bore sixe, wheel cylinder bore size, disc vs drum brakes, pedal ratio or other things. I may be all wet on this and if i am, I am open to being corrected by the facts.