I realise my engine isn't an LS engine.
But I found out on my first track day, that when I started the engine, after sitting in the pits following a track session, the engine would blow a heap of oil smoke out the exhaust for 20 seconds or so. Seems it had dragged a heap of oil into the intake. So before next track day I fitted up a catch can and there was no further oil burning problems. And it caught quite a bit of oil in the can, especially in the early couple of sessions where I was had it sitting above 6000rpm fairly regularly.
Some advice I will offer you from my experience, is a lot of so called catch cans are simply an empty oil can with a couple of pipe fittings. They won't do a proper job of seperating the oil, because there is nothing inside to catch the oil. A proper catch can/oil seperator will have some sort of baffling inside to catch the oil before it gets sucked back into the engine. I ended up buying a catch can with nothing inside (because I couldn't find a proper one), pulled it apart, fit a piece of aluminium plate (with several holes drilled in it to allow airflow) inside dividing it into 2 halves (inlet side and outlet). Then stuffed some stainless steel wool into the inlet side so it would catch the oil. Worked a treat.