Someone talk breathers to me - my engine builder said I need uprated breather on 400bhp or the engine will vomit oil out of every seal/gasket

I'm looking for something std/stealthy looking like the pro alloy kit

http://www.proalloy.co.uk/cgi-bin/si...71&id=proalloy

http://www.proalloy.co.uk/cgi-bin/si...08&id=proalloy

I don't want a catch tank and I don't want my cam cover drilled, can I just use the bungs on the block and return to sump plug and vent to atmosphere or something?

I was looking for pics of Pete's old saff, but he's deleted them all