I have replaced the drums on my 57 with a complete power disc brake kit from CPP. Front disc are 1978 to 83 Malibu and rear are 1980 to 85 Cadillac Seville. I could never get a good pedal no matter how much I bled the brakes and I took it to two different shops with no success. Thought the brake booster might be the problem because of the high lift "Thumper" camshaft so I installed a vacuum pump (which vibrated the entire car) and a vacuum tank before finally figuring out the Seville brakes on the rear were not adjusted properly. I eventually removed the brake booster and all of the other vacuum related equipment and went to a straight master cylinder braking system. The brakes still suck. Very dissatisfied with this setup. Anybody have similar experience and will replacing the disc pads with something other than what was supplied with the kit help the situation? I paid $1600 for the kit and am reluctant to chunk for a set of Willwoods (which in hindsight I should have purchased to begin with)