You can raise rpm this way. But without predictable results. For example, as soon as you turn on the AC, put the truck in gear, or turn on lights for that matter, rpm will change. Even a different oil weight will change it. That is because this isn't an rpm control technique, but rather fuel control.
As I stated before (for the benefit of anyone who wants to experiment), be aware that changing the LBZ 0 TPS column to non-zero torque or fuel numbers can result in very anomolous fuel pressure loss, and stalling. Losing your power steering at the wrong time can really hurt. Your mileage may vary, but I nearly wet my pants.