I put a Home Depot air compressor filter(the small one) inline between the pcv and TB. Air filter on the passenger VC. Air filter on drivers side VC with LS1 pump. Pump is unseen behind front bumper, I have the same filter plumbed inline here also.
Filters are 11 bucks each. LS1 pump was 25 bucks to my door (ebay:biggrin: ) The most expensive part of the setup was the Racetronix wiring harness, yeah I know i could have made it myself but for 60-70 bucks its is nice and I bought it.
No oil in intake. No leaks on a girdled engine. No oil out of breathers.