willys engine

Trying to find out if anyone knows what this Willys engine was for. Found it in my garage and would like to to go to a good home if possible. I figure someone may be looking for one.

Hi Folks, I'm brand new to the forum, and would like to respectfully request your expertise/input right off the bat: my father-in-law had an old Willy's Jeep (not sure what year/model, but I think a 60's version), and there was an extra engine with it. The Jeep was given to someone else, but...