Identifying this housing was extremely difficult for me.
The box it came in was labeled 380241 and I believe it to be accurate, although I cannot verify 380241 to be a good part number.
Please look at photos carefully at the mounting area. I have highlighted an area that can be used for identification.
The gearhousing has new driveshaft bearings installed. Upper beating has 1 5/8" i.d.,  Lower bearing has 1 1/8" i.d.

Look, I'm just trying to find good homes for these orphan parts, next stop for them is the dumpster. Save the earth- buy this part!!

This part was recovered from a long closed O.M.C. dealer. 

Genuine OEM part!! 
NOT AFTERMARKET OR "WILL-FIT" PART

alternate numbers:
382234 
0382383 
312923(cast)  

includes: 
0379499 379499 Roller Bearing(lower driveshaft), 
0379505 379505 Bearing Assembly(upper)

Free returns are available, but abuses of ebays return policy will be reported
(sorry, been there, been burnt)