Dear Keith;
It may be a head for military use (ambulance) as auto production stopped after the bombing in December of 41. It was cast in April of 42 and is much smoother than the usual 216 casting.
What kind of wire is it?? It may be some type of "anti-corosive" mechanism, as 'coolant' as we know it wasn't used then (only water soluable oil).
Good luck.
