Chassis Number Location

[Lionelgee]

Hello All,

I am starting to wonder about the capacity of my truck. I just measured the wheel base and it is 13 ft and 7 inches. Now according to my 1940 Shop Manual Chevrolet Maple Leaf and GMC trucks 4th edition Reproduced for use by the Australian Commonwealth Military Forces printed October 1942 and assuming the following:

Wheel base is measured from centre of front axle to centre of rear axle I am in the range of:
133 3/4 - 157 3/4
175 3/4
This means 13 ft 7 inches is equal to 163 inches according to the chart in the book my truck comes out to a 2.5 ton truck. Also the same dimensions for a 3 ton truck too just to make things interesting!

Have I got how to measure the wheel base wrong?

Because it means someone took off the compliance plate off the fire wall of my truck and stuck a smaller capacity plate loose in the glovebox for people like me to find and read. Because the plate I found in the glovebox says Chassis maiximum weight in pounds is 3400 and Gross Weight 11500 pounds

Kind Regards
Lionel