Originally Posted by DJRoy
What is the maximum constant speed I can drive my truck without damaging it. What should the RPM be at 60mph? I have a 235 engine in it with 3 on tree
Dan

If you have the standard 16" tires and the original 4.11 rear-end, the RPM at 60mph would be about 3050.

calculator (at the bottom)
4.11 rear end
27.2 rolling diameter of tires
60 MPH
1.00 transmission high gear ratio