A833OD inspection results... thoughts?

Can you bore out a small diameter extension housing to large??
You could try but it's a multiple step operation, and I don't think there would be enough support when you got done.You're talking about 90mm less 80mm divide by two, equals cutting out 5mm or .1968 of metal, which is a tic over 3/16. No, I don't think there would be enough metal to retain the snapring when done. I'm going from memory, so guessing.