Correct, for example the Canadian DND designation for the F60L long wheelbase 3-ton truck was "F-60448-M". This tells us it is a Ford, 60cwt, 4 wheels, 4 driven wheels, 158"wb and Military cab.
So the F60445-M on your F60L translates as Ford, 60cwt, 4 wheels, 4 driven wheels, 115"wb and Military cab.