Mike I was just working on mine. I run the vacuum line from the downdraft hole ( that's where the PVC valve is located) to the intake manifold right below the carburator. The air intake comes in the engine through the valve cover where you add oil
P. S. I've experienced no excessive oil consumption.
Give me a minute and I'll get you a great link and a couple photos.
http://devestechnet.com/Home/PCVInstallPhoto 1 where air enters engine
Photo 2 where the down draft pipe was, now it's where the PVC valve goes
Photo 3 PVC valve
Photo 4 where the gas from the crankcase enters the intake manjfold.
