Itchigo

Im sorry for the bad english:/ Im from Norway

I am building a catch tank setup, and i have the design of the tank and venting of the top (vavle cover) finished. (tank is under construction)
But as far as I understand it would be beneficial to went the bottom part of engine also. Is there any places where I can do this without drilling into something? If not, where is the best place to tap in?

I have tried searching for this but it seams few has vented the bottom part.

thanks

Itchigo

mabye this should have been on FI.