Rapid,

Good points, I'll try plugging the distribution block next to try to eliminate that from being a problem, then move to the calipers.

John- the distribution block I have now is a "supposed" good used. I bought a new one also but saw some threads about the new blocks having problems. I got the new block from Inline Tube, as well as the stainless lines.

Funny thing, my original block from my 4 wheel drum car is the same as the used one I got AND the new one Inline Tube sent, both purchased blocks were supposed to be for a 70-74 Challenger front disc, rear drum. Challenger 1's pics from this thread show a different distribution block on his Challengers from the factory. I didn't think too much about it because Ehrenberg's response in this thread indicated that the drum distribution block would work with the disc conversion.