340 motor pumping excess oil on right side

What kind of air cleaner are you running? Got a picture?

You say it only sucks oil when you connect the breather to the air cleaner? Does it blow oil out of the mesh breather if you use it instead?
old school 56 caddy air cleaner and yes lightly blows out the mesh and covers intake in residue see the pic


air cleaner.JPG

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stude motor.JPG