So I've just bought an engine and got it up and running, however the inlet manifold has had a few holes filled and smoothed, one of which is the one for the Pcv valve, I bought the engine with a standard rocker cover as the previous owner has a race spec rocker So the question is what's the best option for me to do?? I see that there is very mixed opinions on catch cans and Pcv valve set ups What's the pros and cons? Help please Neil