engine block pcv

[sonicsr20]

alrite i kinda have the concept of the block pcv but i wanna eliminate it. its on an s13 dohc. so i have heard of eliminating the pcv valve but running it to a catch can. well i dont understand how that setup goes really. as to i havent seen the block pcv valve so i was sondering if someone might have a picture of the setup or maybe even a diagram. help me out please