I dont have a cluethe only identifing marks are PCM and what appears to be the date 03 04 96
I have 6 pics but I'll upload 2 to save time.

;)

thats wierd lookin, where did you find it?
you sure its not some foreign car transaxle part?

It's not an adapter, it's a boat transmission. PCM (Pleasure Craft Marine) Sells in-board motors and trannys.

http://www.pleasurecraft.com/transmission.html

I knew someone would know
I drug in a old chev and the thing was in the back of it
Thought it may have been a adapter
thanx to SeaBass44 for posting