This topic comes up from time to time and most of the people that bring it up have no idea that bith GM and Ford have 2 different GVW's in their 3/4 ton chassis...I can't speak to the Ford ratings, it has been too long since i dealt in that stuff day to day, but the GM GVW's WERE 8600 lb GVW for the light 3/4 ton and 9200 for the HD GVW...the 1 ton in a CV is rated at 9660...that 460 isn't the only difference either....as i mentioned in another thread, i am sitting in a Tranmission repair shop as i type this...I have 1 ton GMC...the Tech total me the the trans in my truck is bigger then the 3/4 ton HD and it is the same unit used in all GM HD trucks from 9600 GVW up 12,000 gvw then they go to the allisons....
When you buy even a HD 3/4, not everything is equal to a 1 ton.....brakes, full floating rear axles, bigger ft suspension etc...
And another thing to keep in mind, when loaded, the heavier 1 ton van, rides and drives better then a overloaded 3/4....as was said, don't send a boy to do a mans job...and so i don't come off as a sexist and since we also have female drivers, don't send a girl to do what you would ask a woman to do...