With the truck empty, the top of the tailgate is 56-5/8". With the 5er connected (~1800 lbs pin weight), it's 53-1/8" and the truck is just sitting on the overloads. It seems that the new trucks settle more than my 01. 5 did with weight on them.
I have also been considering removing the spacers. There are two of them, and each is 5/8", totaling 1-1/4". Because the truck is tail high, the truck would drop about 1-5/8" at the tailgate from the mod before loading. I don't see where removing the spacers would hurt anything.
Here's my reasoning:
1) The truck has a rubber bumper that is designed to touch the axle housing under (very) heavy loads, so the drive shafts and shocks must be designed to allow this amount of travel.
2) Assuming that all configurations (reg cab, Hemi, 2WD, etc. ) of my truck use the same spring arrangement, the rear suspension must be designed to allow for considerably more weight than what I can "leagaly" load my truck to because, with my configuration (4WD, quad cab, Cummins, 6 speed), I have the lowest payload available for that model. Removing the spacers would still leave plenty of travel for the springs before "bottoming out".
From looking at the spring attachement, it appears that the spacers could be removed and the U-bolts re-used as the threads seem long enough, and a washer or two could be used if you ran out of thread just before the nut was tight. Does anyone have a manual to find what the torque value is?