Texasdoc,
You say you have one breather filter on one rocker cover.
Is the filter
oil soaked from the engine? Who makes the filter, and it's dimensions?
The reason I ask is sometimes a fresh engine may have a higher than average blow-by until the rings have seated.
How did you "seat the rings"?
Personally I'd still have a large breather hose to the carb airfilter, then the crankcase pressure is vented with no restriction like a small valve cover filter might have.
Gary