James Gebhard wrote:
 >> I had let the engine warm up before I did the final torque on the
headers.
 >> they won't seal to the heads . (I'm considering using the torch) any
advice?

I've had to use a file to flatten the mating surfaces on the flanges.
After I'm certain that the mating surfaces are true, I use Permatex
Ultra Copper RTV on the gaskets, too.  Oh, and use new gaskets each time.

Mike