Needing stock 8 3/4 10x1.75 sbp drums

I just got some from rock auto, they looked right to me. Guess I better double check them. Not the bell shape like original.
Here is the ones I bought. Comes up as rear 10" brakes. Searched 71 dart 340.
CENTRIC 12363044 Drum | RockAuto

I will go and check against some originals and report back.