[Short 3/4]

May have the optional 4.57 ratio and somebody may have swapped in a 4.10. These are the only three ratios it can have if it still has the ho72 rear. Only way to tell for sure is to jack up the rear, spin it and do the math. No matter what you are still looking at a top speed of 60 at best, which is really as fast as you want to go in one of these trucks.