Street engine or a racing engine?
Race engines do not use PCV valves. Oily air drawn in the intake from the crankcase in a racing engine is a bad thing and does not provide any crankcase vent at WOT when you need it the most for ring seal etc. Use a header evac vent or two large breathers, one on each valve cover would be better than a PCV in a racing engine.
If you are a street engine application then use a PCV with the highest spring pressure and smallest hole or restrict the hose inner diameter to prevent drawing in too much air volume, use a large breather on the opposite valve cover for street applications.
Bruce