Guess what these are and from what engine?

[HS30-H]

1 hour ago, 240260280 said:

Thanks for the corrections.  I did some further checks and it seems the G7B has a crossflow head? 

The drawing above only shows the outline of the "invisible" exhaust manifold (you really have to look for it)  on the left side of the head below the intake; so the above drawing seems to be the earlier G7 without crossflow? 

G7B-R was the crossflow-head version.