Ron, you are right. Thank you for the correction. It was the center of gravity's distance from the fulcrum that I was thinking of as you pointed out in the wheelbarrow post. I am going to delete my other posts as if to not leave incorrect information posted.
I am going to run some numbers on the COG of the truck and load in the bed though, as I do think that it is significant in the weight distribution of the truck. I am referencing a specific time that a kid I was roofing with loaded an entire pallet of shingles in an F150 and the front suspension was at full droop. And yes, he did have them loaded over the axle, not behind it.
Also, when setting up race cars we used 4 wheel scales and adjusted the coil overs up or down to balance the load side to side and or front to rear but I realize I am providing personal examples here and not numbers so I will get back with everyone soon.
Thanks for the discussion.
I just remembered, you can only do this for cross-corner weights, not for side to side or front to rear. So disregard that.