If I were on your shoes I would do something about the original 4:11 ratio. Whether you go the Patrick's route or change to a more modern set-up, you will be glad you did something about getting your speed up and your engine rpm's down..
I drive my truck quite a bit. When I plan my route I try to avoid the highway as much as possible. There are times though, when you need to get out there and get moving. I have the Patrick's 3:55's and never go above 60. For me, that was the best money I spent on the truck. It makes it a lot more practical to take on a trip and enjoy..
