7-1/4 inch axle bearings

I'm reading directly from the picture and listing on the Rockauto website and it says for Centric 41164000:

Fits Rear; 9" Brakes
Or Rear; Front Disc brakes; 7-1/4" Axle
Or Rear; 10" Brakes; 7-1/4" Axle.

Now I didn't order this part directly from Rockauto. I think the part came from either Napa or Carquest, but the part that cross referenced to this 41164000 is the part that we installed in my 10" Brakes; 7-1/4" rear, and it worked. Someone else might clarify, but this is exactly what I used. Not sure if the model car makes any difference but also note that this was for my factory rear end in a 69 Dart.