Mugsy,
As you have now noticed, 3/4 and 1-ton trucks are geared lower than 1/2-tons, for moving heavier loads. What I am going to do with my 1-ton '54 GMC is install the '67-'72 carrier with the 4.10 gears, then install a transmission with overdrive to improve the top speed. With the engine I'm working on, it will never break 100, but should be happy on the highway.
