Crankcase breather & BOV question

[rn240sx]

Here is my 1st question. On the greddy type S the instructions say to hook the bottom stem to pressure ONLY.. On the picture it just shows a short 3 inch hose from the bottom stem and it goes DIRECT to the pipe its mounted to... which in my case is the cold pipe... so i guess I can just weld another stem next to the bov to feed pressure to that bottom stem on the bov...Will that feed pressure only..??

2nd question is the crank case breather. Does it need to see vacuum all the time or can i just slap a filter on it...?? Reason why im asking is cause I wana disconnect the breather hose from the intake pipe and use that same port to recirculate my bov... Being that this is a turbo ka, will the filter work fine on the breather..??

ThanksRobert