I added a PCV to my 216 and it's worked out pretty good. My 216 has the 3 vent slots cut in the top of the valve cover but I plugged them up and went w/a vented oil fill cap I got from Classic Truck Parts. It was listed for 53 and up 235s but fits the 216 fine. I originally mounted the PCV per Deve's mod but changed to mounting it into a modified draft tube to cut down on the amount of oil that was getting sucked up into the intake manifold. Altho I indicated the PCV clamp was just temporary I haven't changed it yet grin
It's simpler to just paste my post from the thread's final setup:

Originally Posted by Volfandt
Update. Heres a pic of the PCV mounted in the road draft tube. It is still a temp setup so don't mind my little rigged up strap to hold the PCV into the grommet.
I figure the gorilla glue will eventually let loose and when it does I have a 30.08mm freeze plug that I will drive into the road draft tube w/a proper grommet that will hold the PCV. Until then this works grin

I went w/a PV1053 PCV is is the straight eqivilent to the 90 degree angled PV 141. The straight PCV lined up better.

The larger PCV that I tried and didn't work was the PV233. It is all metal and also straight but came w/a 90 degree adaptor. IT would stay in the glued in grommet without my rigged up strap but unfortunately is too large and draws too much vaccum which negatively effected the vaccum windshield wipers.
Dave

1949 Chevy 1/2-Ton 3100
1949 GMC 1/2-ton 100
In the Stovebolt Gallery
More pix on Photobucket
Video of the 216 running
Video of a Winter Cruise