Here is a guy selling just the center section. It has three ribs on the drivers side and two on the passenger side with one angled up at the 10 o'clock position. Daves's rear end has too much dirt on it for me to see if the fill hole is in the same spot. Note to Dave to please wash his rear end before sharing pics please.

Tabs on the housing could have been cut off in the past. Or maybe it's not a 57-64 Olds Pontiac setup?


https://www.ebay.com/itm/3-64-DROP-OUT-V...=item3d4fe362ad