Quick update for anyone new browsing this thread and a warning. I did the PCV mod to replace the leaking oem kit on my BAM. Went the route of single pipe from mani to brake servo. Fitted a pipe with check valve from mani to t-peice, crank breather to t-piece, t-piece to cam cover breather, then to hockey puck to TIP.
Worked fine until my first sprint event. Sprung an oil leak from the dipstick that had been popped out. Turns out the metal check valve between the mani and Tpeice failed allowing full boost into the PCV - at the event I was full pelt round a track and on boost a lot. I checked it before fitting, so either a dud or its not rated for the boost pressure. Can't see many check valves with pressure ratings on Amazon.
I've now followed Tuffty and blanked the mani and going from crank to cam to hockey puck to TIP with no catch can.