I use the WOT method also- only minor difference is that I lean it out till it will run at least 180F. I try to maintain 200F, but running WOT it just does not happen- covering the head or not. Using the method exactly as described on CEFX I can only get the engines to 140F. It only takes 1/2 turn or so leaner than Joshs' settings to get the temps up to 180+.

I've done three engines recently like this and they have the most compression of all my engines.

Use the WOT method- just keep the temps up.