I did Deve's PCV mod on my 216. It worked great with the exception of manifold vacuum sucking up too much oil into the intake. The high mile engine has noticeable blowby which pushed more oil out to the PCV valve, even tho it does have the deflector plate installed.
So I cutoff the down tube on the road draft vent pipe and mounted the PCV in the cutoff stub pipe. All that internal baffleing of the road draft vent is keeping the oil in the engine and not sucked out to the intake.
It works so well that I'll be swapping the setup over to the 235 I'm building.
I haven't noticed any adverse problems and I feel that the engine breathes much better w/the PCV setup.
Dave
