1981 300SD PCV / Oil pan / Emissions / Air filter - What to do?

[Bcollia]

Greetings all. I am taking a quick break from the W111's to perform maintenance on my W126 so I can take her spin more often. The tab for the air filter housing broke off and instead of welding it back on I decided to do away with it and put a filter directly off the turbo. My question is this: Should I place a breather off the valve cover or use a PCV with a line going from the valve cover back to the intake tube off the turbo, which will be post-filter? Same goes for the metal pipe coming up from the oil pan that used to connect to the bottom of the air filter housing. Is there any harm in having hoses come from these and be placed just prior to the turbo. I have NO shaft play on the turbo and would like to do as much as possible to take the best care of it that I can. The PCV valve I got looks very similar to this. I also got a couple breathers similar to this. The intake tube has a spot to accomadate a hose and I have a T in case I need to have both go into the intake tube. See picture below, blue shop towels used to block places in question. The hole on the intake tube is just out of frame.



Thanks again for all of the help fellow Mercedesaholics!

- Bryan