340 motor pumping excess oil on right side

Johnny Mac said
Maybe I'm missing something.

Your pcv is on the left, and doesn't foul plugs right?

But your breather on the right huffs oil.

So...add a baffle extension like I did. Leave pcv on left. Breather will stop huffing on the right.
Done

sounds like a possibility , im currently just running a down tube from rt breather to behind the block , did you ever find out why or what causes this ?