Can anyone tell me what this is?

And I found some dope here:


Evidently the LH rotation engines use "normal" distributors and oil pumps BUT THE DRIVER GEAR causes a thrust problem on the dist/ driver gear/ oil pump so the LH rotation engines should have a special wierd not to mention different piece where the distributor sits to provide a thrust bearing, and what I've read indicates it spaces the distributor up somewhat

http://www.marineengine.com/boat-fo...tor-Gear&highlight=chrysler,+reverse+rotation

http://www.marineengine.com/boat-forum/search.php?searchid=171906&pp=