Paul, is this the one you have?:
Looks like a great harness. This could be made to work on a Scout or TG (I'd go Scout, btw). The biggest obstacle is that this is set up for 1.5" webbing, and the Kifaru products are set up for 1" webbing. You can either run 1.5" through the harness that terminates in 1" webbing for rigging to the pack, or rig the harness to take 1" webbing. On the back, I'd probably ignore the harness buckles and run 1" webbing to the outermost PALS slots. On the front, I'd probably lace 1" ladderlocks into the harness buckles and then run 1" webbing down to the pack. This is very simple custom work. I'd recommend a guy who goes by the handle Ralph on the Kifaru message boards for something like this.