oil catch can querys

[dr damage]

hey guys

i have a 79 c10 350 sb chev pick up, semi pro touring, air ride, big brakes wheels etc.

i am wanting to install a oil catch can and am going to run 2x pcv valves and run the lines from those to the oil catch can with a breather on it.

my question is should i remove the balls and springs from the pcv valves to guarantee there abilty to breath.or will it be ok with them still in. they do flow through when you blow through them but im just a bit worried it wont be enough and it might create to much internal pressure.

i know the best way would be to get new valve covers and get nice fittings welded on but i will do that a bit later on.

p.s. i am in new zealand

thank you in advance

regards

matt