1947 Super Deluxe V8 engine ground strap?

[Clrascoe]

I am a new member and just saw this post. I see that the engine in the photo is green. Mine is also the same green. Someone at Ford told my father that was the correct color when we were rebuilding the engine back in the 70s; however, all the parts catalogues say the engine paint color is blue. Does anyone know what the color should be? My car is a "late" 47 super deluxe.