The 8.25 I have is definitely for an A Body based on the perch and housing width. It looks like its all original. I see that chart doesn't even list an A Body 8.25; that 905 number looks like a part number and could be a carry-over from the 69/70 B for the A's. I do know that it takes the early bearings, races, etc. Maybe someone else who has a 73/76 A 8.25 can check and see what their numbers are.