Aren't there more/wider springs on the 1-tons as well?
Whether it's a '48 or a '68 - these trucks have all earned their keep, and kept on giving. Then, when people look to restore a truck, the 1 ton is almost always passed over for the 1/2 ton. I can't count how many times have I've scoffed at an overloaded 1/2 ton, but grunted approvingly at a fully loaded 1 ton just doing it's job.