The colors blobbed onto the bottom of your 8.75 center cection signify the gear ratio. Odd that the tranny is painted black, have you checked the VIN to see if it was swapped out? Maybe just R&R'd the original for a leaky seal or something? Be sure to get pics of the orange overspray pattern on the bell housing as well as the location of the wire clips, etc.

Good stuff, thanks for sharing!