Help identifying a833

Early (1975) ODs had iron cases. This one is most likely an OD. It is out of an F-body and WILL fit an A-body with the proper corresponding parts (Bell housing). I had some leftover parts and built a small bearing A-body overdrive in an iron case. Sold it to a buddy of mine for his original '68 Barracuda 318/4sp. He absolutely LOVED the OD, including the 3.09 first gear.