Rick, Blykins,
I'm running with 20w50
oil with Zdd+ additive
I removed the PCV valve 1 year ago and replaced it with a valve cover breather on the right valve cover meaning that I've got 2x valve cover breathers on my engine (one on both side).
Few smoke is leaving from the 2x breathers when engine is running at idle.
I've used Edelbrock intake gasket (7224) which match perfectly with my Edelbrock intake.
My heads have only 5000 miles since buy new.
OliveR