Your truck weighs about the same as an AD.
How is your clutch? My truck would only go 30 mph up hill. Turned out the clutch was slipping.
Also, what size tires and wheels do you have? The larger the diameter tires you have, the faster your top speed will be for a given rpm.
My truck also had crappy 15" wheels with low profile tires on it when I got it which also slowed it down considerably.
Proper 16" wheels with 30" diameter tires and a new clutch made 65mph possible.
