PCV issues?/hesitation

I want to thank all of you for your replies.
The problem turned out to be ignition timing.
I had replaced the damper, timing chain, and cam gear.
The new damper has several notches for timing-- I'm guessing that it fits several vehicles.
Anyway, I was using the wrong detent for timing. The one I picked was determined by checking that the #1 valves were both closed with the valve cover off. As it turns out, not a very accurate way to do it.
I figured this out by using a piston stop tool to determine TDC accurately.
Simple solution for a vexing problem!