Need Help with Front End kit

I am restoring a 1968 Dart 270. I have a 1972 Duster 340 donor car. The plan is to put the front suspension from the Duster into the Dart, 340 k-frame and all. The Duster has single piston disc brakes. P.S.T. tells me they were not available until 1973, so there is some confusion about what rebuild kit to use. Please help identify these parts. Thanks.