That return tube is about 1/2" in diameter... what could be blocked there?

Are there any "deformities" to the air filter housing?

Where does the oil tend to pool? Pics?

__________________

'82 300D (project)
'46 Willys (project)
"Nothing seems to be the way it should in this garage." -jt20
"Smarter than an engine, dumber than a hoodlatch..." -jt20
"Start jumping up and down to smoosh down those engine mounts" -DeliveryValve
"no" -kerry
"At this rate, you may have it done by winter" -layback40