That gear ratio is quite standard for 1/2 ton trucks. And for lots of 3/4 ton as well. Original ratio was the same.

http://chevy.oldcarmanualproject.com/shop/1948_51truck/51ctsm0447.htm

Torque is what moves things. And with 4.11 to 1 things get moved. Later trucks have adjusted to higher road speeds thanks to the Interstate system. But before that...moving stuff was the goal.


Steve H