If you drill through the intake fabricate a metal shield or baffle and attach it to the underside with a slight standoff. This will not prevent but it will help you keep oil out of the PCV.

Consider breather vents on the side of your valve covers and a cap on the oil fill. This will bring the air flow through the heads.

PCV equipped motors are cleaner inside and the oil has less condinsate (water) in it. Condinsate in the oil reduces it's lubricating ability and promotes wear. So, a good PCV system is something you should want.