Swapping pigs

The one on the right also looks to be the newer style Auburn, not an OE unit!
The PO of the Dart was a mechanic; the Dart was originally a /6 auto with a 7.25" and he swapped in a 360, Tremec, and 8.75". He did a nice job on the build; it doesn't surprise me that the bearings and diff aren't OEM.