Confirm engine number

[royhall]

If you check the underside of the head the casting is unique to the F2. The oil drains are cast different to the k's. The F2 head won't fit a k block.

[captaink]

Thanks for all your comments,
I'll let you know how all progresses

[Bryanj]

I think the only difference on F2 cases was the black paint, early 750 cases were different and I know the output shaft bearing changed a couple of times but not sure about the groove for the clip in the cases