Well...we pulled the engine out and scraped off about 10 pounds of grease and pulled the acorns out of the manifolds and here's what we have...

Note an extra tag attached to the block center right. Here it is.

So our hero got a rebuild in Kalamazoo in April of 1960...one thing about those Checker guys, they got their "moneys worth" out of this little freebee. Here's the passenger side.