My nephew gave me a 1988 F250 7.3L diesel with a Banks turbo. It has lots of hp and 650fp of torque.

My problem is that it's geared to low for freeway travel. 60-65 is max speed and for hunting and wood cutting around here you have to travel some. I believe the rear-end ratio is 4.10. I don't do a lot of 4x4ing so being low is not a priority.

What do I need to do to gear it up a bit?

Thanks

 

you could go to 3.73's or put some bigger tires on it. what size tires are on it?

 

Swap in a 3.55 axle and OD transmission like the Zf 5 speed..

 

The tires are 33" highway/off road