This probably needs a different thread as to not clog up Dean's build thread but: IMHO – a proper PCV configuration extends oil life, diminishes oil contamination and helps engine sealing via internal vacuum. On the LS motor - fresh air is pulled in from one valve cover, travels through crankcase, and is pulled/exits from the other valve cover and/or the PCV tube just under the intake manifold. Use an oil/air separator catch can and plumb the exiting PCV lines into can and then from can into the intake manifold. The oil/air catch can helps remove oil residue and contaminants prior introduction to the manifold. Less possibility of oil build-up in intake manifold and less likelihood of octane knock due to oil laden fuel charge. I drain my oil catch can every 300 miles or so (1-2 ounces of oil laden vapor/fluid).
Now if a track car and the engine lives at wide open throttle, gets oil changes each weekend, either blows up or gets rebuilt frequently then probably won't matter much.