once you've removed the kidney box and all the pipes that go into the kidney box, you will be left with a hole in the block. you will need this adapter to fit into the hole http://cgi.ebay.co.uk/RS-Cosworth-Pi...d=p3286.c0.m14 you will then need a new piece of pipe to fit onto the adapter and long enough to reach the top right outlet of the breather pot

you will then need to drill your cam cover and fit this adapter http://cgi.ebay.co.uk/RS-Cosworth-Al...d=p3286.c0.m14 then run a small amount of hose from the cam cover adapter to the top let outlet of the breather pot

you will then need to fit this adapter http://cgi.ebay.co.uk/cosworth-breat...d=p3286.c0.m14 which screws into the block, turbo side (this is capped off from factory). - A new pipe is needed to be run to the smaller outlet on the bottom of the breather pot from the adapter once fitted

finally the last outlet on the breather pot (the biggest in diameter) vents to the atmosphere

you dont need to block anything off, as there shouldnt be anything to block off!