If you use block off plates then no hoses required. When you remove the kleen system, plug the vacuum line. You will need to plug the hole in the frame above the tbs.Duck00* Think this is the push-in breather, Click Link ..but I have no idea about the inner diam. of the tube (guess is its either a 3/8" or 1/2" diam) that comes from the crankcase at this moment. I am shore CMG will tell us the size of the push-in breather he used.
Also.. My question is. If one uses a crank case breather, do you only need to add the block off plates and then you can completely take off everything that has to do with the Kleen Air stuff? Or do you still need to add the tubes according to the "Blitz Kleen Air Delete/Removal"..