I'm not the guy with a lot of information here, I'm sure others are more versed on the differences of a 1/2 to 3/4 and 1 ton trucks.
I will say though so far on my 1 ton I have not had a problem finding parts. Cab and sheetmetal parts seem to be the same. I have not gotten into the brakes on my 1 ton as they do work well, thats the only one I'm concerned about when the time comes to replace parts.
I say if you can find a good 1 ton, and sounds like you have, go for it. Change the gearing in the rear end and you will be able to keep up on the highway. Be sure your brakes work good if you do change the gearing.
I really enjoy mine. only drawback is it rides like a truck!
