removing pollution system

Hi! I have 1984 GPz750. Someone put a post on here of what to remove and plug up on a 1980 1000 i believe. My bike is very similar except there is also a hose going from the crankcase to the air box. What do i do with that? Plug nipple on air box and crankcase? Or does this have to stay in place for crankcase breather? Thanks!

I would leave the crankcase breather connected to the airbox & just plug the hole for the fat vacuum switch tubing.

Thank you!