Adding a PCV is a great mod for a Stovebolt engine. It not only pulls more crankcase gases out than the road draft tube at idle and slow speeds it also reburns them which is a win/win for the engine and environment. Connecting to the vacuum port on the intake manifold is where you want to get your constant vacuum source.
Depending upon the condition of the engines bottom end, mounting the PCV in place of the road draft tube may cause it to suck up too much oil, as my old 216 did. Leaving the road draft tube installed and mounting the PCV at the top by cutting off the down tube portion alleviates this problem. If the engine is a somewhat fresh rebuild it may work fine to mount the PCV in place of the road draft tube.
re. HEI dist. another great mod to do to these engines. The OEM is not a direct drop in fit as it has to be modified to work. The mounting flange needs to be machined off but it's very doable. The large coil cap will clear. Only problem is some folks don't like the look of that large coil cap. It doesn't bother me LOL.
Theres several aftermarket providers that carry a small or mini HEI distributor already setup thats ready to drop in and go. Another enterprising fellow has a kit that modifies the OEM point dist and coil to accept a GM OEM electronic sensor with an external controller so theres several ways to get OEM type electronic ign.
Good luck
Dave
