no, you didn't lose me. that drum will not fit. 73 Duster calls for the same drum as the one I bought. part # 2947DGS. That drum I pulled Tylers Dart Sport drum and it fit his car. It has a 2.80 pilot hole same as the 9498 DGS. My pilot hole on my Duster is 2.5 ". The drum that I need, marked 21227-C has a 2.5 " pilot hole. How that 21227-C # crosses to a 9498 I don't know. I put the drum I bought today,2947DGS on Tylers axle and it fits perfect which is what that car calls for. I don't know what Moser did when they set up this rear end years ago but I know I have bought new drums for it. And I know I didn't buy it for a Ford. So what Mopar vehicles have a 2.5 " center hole with a 10" drum.