One point (not to detract at all from the excellent work done to this truck)...
The wheel hop issue has been inherent with both the M35, the M813series, the M54 series, the M939 series, and even the FMTV and commercial trucks, due to the geometry of the rear suspension. Anytime you use the same trailing arms from the #3 axle (rear rear on a tandem) in suspending the #2 position by simply turning them around and using the same bolt pattern to attach them, you create what is called a pro-lift (as opposed to the anti dive or anti-squat) in the #2 axle. While lowering the tire pressure in the tires on the #2 axle mitigates the effects, somewhat, it is not a "cure" in any manner of speaking. The only way to truly eliminate this effect is to rebuild the geometry to have anti dive and anti squat designed into the way the axle moves under the truck in reaction to the suspension travel and the effect of torque loading of the pinion.
Again, good job on the conversion.
ADDENDUM: The reason lowering the tire pressure works is that the tire becomes more compliant at lower tire pressures. This is the principle of CTIS.