14" tires and or slicks??

Hey guys im looking for a set of tires for the rear of my car (for some reason they wear much faster then the front :dontknow: haha) But does anyone have a set of 14 inch tires (would prefer slicks) that are in good shape? I have 205/70/r14s on it now and would like to go a little bigger then that. I have a 72 duster but not really sure what the biggest tire i can fit is. I have air shocks so i can lift it up a little bit too. But anyways if you guys got anything just let me know! Thanks!!