PSchwering,
DC and everyone else that I know of do their math for weight ratings on how they set up the drive train and suspension. That is what size springs, axles, wheels, tires, brakes, which engine, transmission, diff. gear ratios, and maybe some other things that we don't think about. With each year that goes by, they make things a little better and the ratings go up. Not sure about a 94 truck, but for 99 the ratings for your truck are 10,500 GVWR, 16,000 GCWR, and 10,000 GTW, and a 2500 is 8,800 GVWR, 16,000 GCVR, and 10,200 GTW. It looks like because we have 2 extra tires and wheels we loose 200 lbs of load weight. How high can we go? Well that all depends on how much money you have to modifiy your truck and replacing the parts that break from being over loaded. But it sure is fun trying to find out how far we can go with our toys.
Have fun Chris