Thanks for the replys.

For various reasons, a onroad head is not an option.

Advice on engine break in. Ask 10 people and get 8 different opinions (at least). I figure the colder an engine runs, the tighter the pinch because of the sleeve constriction. The higher the degree of pinch, the more the rod wears. I would rather run at 240 than 190 degrees. I think engine damage during break can be caused running at too low a temp and unloaded.