[chris71]

A few things. A distribution block is for 4 drum cars, pretty sure you need to switch to a proportioning valve for a front disc/rear drum setup. Also the MC needs to be for a disc/drum setup as well. Disc brakes require more fluid volume and less fluid pressure than drum brakes. Also, did you swap to power brakes? if so check the vaccum pressure to the booster from the mainfold. i think you need like at least 16 to 18 psi, since you changed engines this something to verify. low psi will equate to crappy brakes. if you disconnected the dist. block, did all the fluid drain out of the MC? if so you may need to bleed the MC. new MC's it is essential to bench bleed them. there is a way you can bleed the MC still on the car. how are you bleeding the car, the way that I do it is get a helper to be in the car, pump the pedal 5 times and hold, then you open a bleeder, to get the fluid/bubbles out then close, helper releases pedal. repeat.