OK, well, I guess I need to govern my throttle hand and ride this thing gently at cruise and see what she'll do for fuel economy.....but she's so much fun. It'll be tough. Yesterday I was thinking mpg would be better than it was in the mountains, since yesterday was more steady state than on/off. Hmmmmmmm. Wonder if I add a 6 speed??? 
Try a tank running under 3K nearly the whole time to get an idea. Now that you have the power, you can probably carry the 6 speed. It's something in the back of my mind for down the road a ways. Keep your eye on e-bay for the SE 6 speed gear set. I think it was Don who picked up one at a pretty good price off there a while back.
I keep my revs up in the mountains so much, it's about the same as running 85mph on the interstate. My optimum fuel ecomomy is under 3K...60-65mph.