I've got a '62 Valiant resto-mod with the Kelsey-Hayes discs in front and 10" drums in the rear. The problem is that I've got to pump the pedal 2 or 3 times before it comes up to where it should be. Aside from that, the brakes work fine. I am using a disc brake master cylinder, but I am not sure it is the correct one. I understand that I should be using the 1-1/32"-bore master cylinder rather than the 15/16"-bore master, so that's the first thing I am going to check. However, I'm still using the pushrod from when the car had its old single-circuit master cylinder. Could that be my problem? What pushrod should I be using? Thanks very much.