Some slant six valve covers

So I got another jewel this weekend from Mopar Mark in MO.
I think this is a Chrysler Marine cover.
There was a listing for this cover in the 1966 High Performance Catalog.
E8029M
List price was $10.85.
I installed the 2 breathers, that weight is included.
Chrysler Parts E8092M (1).jpeg

Chrysler Parts E8092M (2).jpeg