"Reduced weight of the LS Series is also a HUGE advantage over the "big" 911 motors. Weighing less than a completely dressed 3.0L NA motor, the LS Series has turbo performance with much less than turbo six weight. With less weight in the rear and more power under your right foot, you can see why a converted 911 is so much fun to drive."
http://www.renegadehybrids.com/
Again, I can't condone this, but its been done