That looks VERY Grey to me. Have a look at that rocker cover. As Nicko said, it has the bolts on top, not along the side. Also, correct me if I am wrong, the extractors look like the correct Grey spacing. Different to the Red motors.
Also, the width of the area on the top of the head, on the carby side is too big for a Red. Just right for a Grey motor. Then there is the heater plug at the front end of the head (About 10cm back). Again, looks Grey to me, FB EK head actually.
In that second shot, it DOES have a red. 186S headers as well & a red style rocker cover.
Rob J
(p.s. Got myself a new LCD 17 inch screen, MAN it makes things clear
)