Ok, Ok. I stopped and got a couple of OS A3 plugs and tuned carb some more and ran for another hour and a half, and what do you know 270-280 running temp. Turns out I was running the LSN too far in (reason why HSN and no affect, thanks ugly duck). she was running good.

Now I still have problem with plugs, on last tank of fuel when it ran out I got truck carried it to porch, and tried to start to run what was left of fuel in lines out. But the plug had a broken coil. I cant be from lean mixture now, because she running good temps and has steady stream of smoke at any throttle position. When I pulled out burnt plug it still had a bit of fuel left on it. Used to I could run several weeks on a plug at an hour to 2 hours at a time. Now I get and hour to hour and a half. At this rate the plugs are goin to run me into the ground.