I definitely never said the suspension would work well for drag racing. It was not designed with that in mind at all.
To address some of the other issues though, the link bars are not parrallel to each other, the uppers angle down slightly. The instant center is about mid point on the front bumper of the truck.
Because the bars are so long and all the upper and lower pivot points are inline, pinion change is pretty much non existent which is what i was going for with a 10" of useable travel before the watts maxes out.
I'm sure there is more force on the bags than a conventional setup but like I said, i can max out the suspension at 70 psi so it cant be THAT bad.