how about a video?
http://www.tylaska.net/vid/1039.wmv
Then a pic...

We fabbed all of this stuff in-house.
Then a dyno graph...

only 718 at the front wheels, but it is over 800 crank easy...
My Pathfinder pulls this thing to the track
As for the PFs front end issues, I would hope that the caster is well within spec on a 6000 mile old rig. IMO, it is a toe adjustment that might get rid of some of the twitchyness. I might try to toe it in just a tick and see what happens... probably won't get any better, though.