RE: Cooling space
Jan....
Now you got me worried here. The cylinder head sticks out on this A/C a good 1/4 to 1/2" (on slope). There is a way that I could move the engine up in the mounts, but this would offset teh indicated thrust lines.
Your mention of 6-8MM clearance is much more than 1/4 inch also. Or, am I missing something in your dimensioning?
Than for everyone, how many square inches of intake area is best? 1/2 inch square OK or must I go bigger?
Wm.