Will, i think it had something to do with how the dyno was run, it was an inertia dyno yet the operator was holding the break for the roller for quite a long time.
He would get the truck in gear, apply the break, wait for the truck to lug... Then pull out and almost clear up the fuel before he released the drum. I honstly dont think the drum was released untill 1800 rpm or so.
He also pulled the truck in 1:1, hence i think it had a bit more in it.
What the tq curve did this time around was interesting, last dyno the hp/tq curves were almost right on top of eachother. Ill post the graph in 2 min.