Rotary Group,
Thanks for the suggestions - questions etc.

Questions and--- maybe answers

Oil pan clearance.
The oil pan is a flat bottom Renesis stock pan .  In the first picture sent 5/27 it is about level with the white motor mount tube under the engine.  At the front it is about 2 inches from the radiator surface.  At the back it is about 8 inches above the radiator.  The pan only covers some of the water rad. and none of the oil rad.  I get better cooling on the water side so I don't believe it is a problem. 

Duct shape.
My James cowl inlet ended about 3/4 inch inside the opening.  I added foam and glass to make a smooth transition to the bottom and sides of the cowl.  Air entering near the top of the inlet either turns up  about 90 deg.within 2 inches of the inlet to the air filter or goes straight back to the radiator.  I don't like this arrangement but don't know how much the turbulance contributes to poor cooling.  My first attempt to improve the top inlet flow made cooling worse so I am looking at other areas now.

Water hose may be restrictive.
The hoses in the first 5/27 picture are oil lines to the oil cooler.  An-10 to the cooler and AN-8 back to the engine.
The water coolant hoses are AN-20 not shown because they are behind and on the other side of the engine.

Turnning Vane construction.
I can easily construct a support that bolts to the bottom of the cowl.  This may be able to be installed through the inlet without taking the bottom cowl off.
I have not found much information on flow turning vanes in either the K&W Chapter 12 or Hoerner's Fluid -Dynamic Drag.  Probably need to look at HVAC duct design information.

Dennis H.