The valve cover has a breather port that is connected to your intake tube connection. The LS block usually comes with a black box (baffled). The black box is connected to the passenger rear of the block. On the top of the "breather box" are 2 tube connections. One connection goes to the top of the LS block. I beleive that is the incoming tube. The 2nd connection is the pcv valve air return to your intake manifold.
I can find a picture of the LS breather box and tubes. What auto does the b16 head come from? I can only get pictures by veh/year info.
If your LS block comes without a black breather box don't worry. There are breather "kits" out there that will improve upon stock.

I have a question. What about putting steel wool into an unbaffled oil "catch" can?? I'm not going to fill it up but about up to the middle?Anybody ?

OK, let me try for that LS picture. RFT