First thing I did was spin the head off. DUH. I didn't need the motor so I tried a bunch of things over a long period of time. The position of the motor and screw left a nice puddle of PB Blaster just sitting in the screwhole but it never helped.

I ended up getting a can of compressed air, like you blow out computers with. I heated up the whole thing with a torch and then tipped the air can upside down and basically froze that screw inside the heated aluminum. It worked. I don't konw if it wold have worked if I did it day 1 or if the long time of soaking, pounding and screaming at it made some difference but I finally got it.

Combine the canned air with roverhi and Hagar's heating method and I bet it works great!