Just saw this post and it brought back a memory from 1965. I had a 58 Chevy BelAir with a 283cu. engine. Governor Brown (Yup, Jerry "Moonbeam" Brown's dad) decided that cars needed to be environmentally modified to prevent air pollution so the way they did it was to plug the crankcase vent with a wooden plug and run a hose from the filler tube to the air cleaner. Their theory was that you would burn the oil gasses by sucking them down the carburetor instead of just letting them vent out into the air. What this ended up doing after a short while was to force the gases and oil out of the breather cap and all over the engine. I ended up having to re-build the engine. Another democrat idea that didn't work.