Graymarine Engine color - 1966 Mustang

Looking for some input as to what color the engine should be for this time period? I've found a few different colors for this time.

The colors it could have been that I've heard: Green, Red, and Gray.

I bought the green originally because that's what I thought it was. I can't seem to find any green anywhere on it. I paid just a little bit of the trans in the last picture to show the shade. Any input is welcome. Below is a few pictures I took over the weekend.

I would assume it has to be the same engine that they used then. From what I read though, I thought the only ones that were painted red were the fireballs. I did have the green made up thinking that was it, I do think it would look good green. Just would like to find the period correct paint.

I have seen the green also. Am inclined to use it on our 1950. There are some green residuals on the engine but you have to look to find them. It has been painted grey presently by the PO. All the Fireballs are red.

No mine was defiantly red and not a repaint. I cannot recall but I thought those grays were 60 hp and the CC version was 70hp could they have been the Fireball's? Pete should know

Looks nice in green.
My '56 Graymarine Fireball V-8 in my Essaness Craft woody is red. I believe that is the original color...It looks great as well.
Gray is so depressing, even if original...Good choice on the green.