Oil wont cool in climb and will go up to 230 and probably higher if not
  stabilized. CHT's are all hot in climbs and will go to 440 no problem. Cant
  figure it out.

 
It sounds like a baffling problem is most likely.  A good seal around the front of the cowling to plenum and proper fitting of lower baffling are the first places I would look on a plenum installation.  

This is a long shot but here goes.  When I bought a very low time RV6 it had a factory new Lyc O-360-A1A.   The builder had hooked up the oil cooler to an outlet not recommended on Lycoming’s data sheet.  So I fixed it.  The oil temp jumped over 50 degrees.  After I restored it, it returned to its previous “too cool” status.  At altitudes above 10 K it ran less than 170 degrees year round.  I never saw temps above 200 degrees on sustained climbs at 1000 to 1500’ per min to over 10k.  Winter required a plate blocking 75%+ of the cooler to keep temps close to 170 degrees.  The cooler was a standard unit supplied by Van’s, located behind the left rear cylinder (viewed from the cockpit) as recommended.  If you are not getting enough fuel on takeoff or climb a fuel flow gauge will confirm that.

You might run this by an engine builder or two for their thoughts.  Maybe they will have a check list of basic stuff.

Steve Colwell   Legacy