I have struggled with this same question. I want to use my truck and drive it regularly. now that I have had it on the road a while I realize I may be asking too much of my old truck. I can cruise at 55 but it sounds like Armageddon, the steering is wobbly and in the back of my mind I am wondering if my brakes have the ability to stop me. as I accumulate time driving my truck I realize that it may be best enjoyed as an unmolested original tooling around at 45 mph and enjoying the ride. then a devil pops up on my shoulder and says "you need to get a modern medium duty truck and put the 59 cab on it." all I can tell you is that is that it is "work" driving these trucks around and that may be the way it is supposed to be. if you add overdrive you may lower your rpms at a given speed but the steering is still an issue.
