64xx 2.0 ton and 1.5 ton vs 4xxx 1.5 ton truck differences:
One significant difference is GVW:
64xx 2-ton - 16,000 lbs
64xxS 1.5 ton - 15,000 lbs
4xxx 1.5 ton - 4100, 4400, 4500 lbs: GVW 14,000, 14,000, 12,000 lbs
Other spec differences are shown at the link in my earlier post.
You might follow-up with another "why all the different models"?
The simple answer is that GM/Chevrolet obvious saw a market for the various models/differences.
What would be an example of a government regulation for weight (back in the 40s or 50s)?
