Not sure Ray. A neighbor of mine's dad used to own a boat repair shop. He has since retired and moved to Havasu, but I believe it came from one of the dad's buddies (via my neighbor). Do you see any major issues or flaws?
Im not for sure but that looks like a stock gen. 5/6 pan that someone added a full sump to it. My old 502 crate motor came with a pan and small windage tray that looked just like that ....minus the extended sump.
The dip stick tube is also kind of a give away......looks just like the OEM one.
EDIT!!
It might just be the picture, cause i can't see the front of the pan. How the hell is oil supposed to get to in to the front of the pan? ( the extended sump) with exception of the small hole (top of 2nd pic.) in the top of the old kick up. If its not open somewhere else that's still just a 6qt. pan.