I can see both sides of the argument, but at the same time there is really no definitive right or wrong answer. It just seems like everyone is going off of experience they had. That being said, I'll probably pull the breather off just to be on the safe side.
Always buying things I dont need to impress people I dont know
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4
All there saying is that you can have only one or the other. You cant have both, since if you put a breather with a pcv valve the pcv valve will pull air from the breather causing a lean condition. Correct me if im wrong.