Let me tell you what I have 1975 Duster Slant 6 w/manual drums. I have a line on a 1978 Volare with the Super 6, which I want, and also has power disc brakes. I know from reading previous threads I can swap to the disc brakes in front. So can I assume that I can use the power disc also? And, off the tread topic, how about the rear end, you know for the large bolt pattern. Thanks for any help!!!...after much research I have found the answers. The rear wouldn't be much help and I'll just go with no power disc brakes up front.