I've done many searches on this and I'm still not 100% sure. I have a 3.55 geared 8 1/4 rear out of, I believe, a 97 Jeep Cherokee. I'm intending to install it in my 73 Duster this winter. I am fairly certain that the 10" drums from my current BBP 7 1/4" axle should be a direct swap to the Jeep rear as it has tiny 9" drums. I'm hoping that someone on here can tell me so I know what I'm getting into before I tear into things.