as Steve said, the water lines to the tb should be eliminated, easy to do. The pcv is not a bad thing really so not a huge deal to leave it as is. I did add an oil catch can in between the pcv and throttle body which eliminates pulling any oil into the tb, as the factory setup does. If you use the pcv you need a breather or inlet hose of some sort to pull air in for it to work. I've also seen people add a breather on the drivers rear of the valve cover, most the LS engines are capped off here.
Or add aftermarket valve covers and do some baffled breathers or even better some remote breather tanks hidden out of site. No oil mess this way. There is also a company who makes an aftermarket block cover that replaces the stock one under the intake and adds breathers there. I ended up tapping into my stock unit for two #10 fittings and lines to two hidden breather tanks, and left my valve covers clean and uncluttered.
Jody
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