The F750 was not in production in 1990.
The F750 was not in production in 1965.
The Ford F750 has a higher Gross Vehicle Weight Rating, and more powerful engine options available.
According to the Ford Website, the GVWR for the Ford F750 is either 30,000 or 33,000 lbs depending on how the truck was configured. http://www.commtruck.ford.com/ctw/default.asp
Ford did not make a model known as the F750 in 1985.
The F750 was not in production in 1993.
one
empty weight
Many websites will have Ford F750 parts. Autozone is a popular and reliable website to look for these. One other which is an option is called Partstrain.
24ton empty
Depends entirely on which transmission you have with it.
36 to 40 oz