Although mine is a 76, with a Dana 60f low pinion axle, its a highboy so I think the same frame. I converted to crossover to reduce bump steer while towing trailers, I tow almost constantly. On mine I used a saginaw steering box from a 97 2wd Dodge 2500, boxed the frame and mounted it inside the rail. The original plan was for true crossover, but I couldnt get what I thought at the time was enough clearance to put the drag link above the spring pack at stock height on a highboy, and still clear the frame on uptravel. I have since learned that steering arms are available to raise or lower the steering arm to put the drag link at the height required to clear everything, which is just barely high enough to clear the top of the leaf pack. If your truck is like mine, there's only about an inch and a half of up travel, so no real worries that direction. The factory bumpstops are about two inces high, so the drag link has to be as close to the top of the leaf pack as possible, like almost touching, even then I assumed 3/4 inch of crush into the bumpstop, which leaves a very small margin for error. So after all this I opted for inverted T style. The only problem I've had is because the drag link attaches to the center link at the front of the link, as I turn side to side the canter link rotates up and down and adds a bit of slop to the steering feel. In my case I had to put the steering box where I did between the engine and radiator, i think the rotation issue could be fixed by figuring out what angle would intersect with the center link and transmit directional force without also rotating the center link, if you can understand my ramblings. On mine, I'm planning on sleeving the ball joint bore in the center link and retapering it from the back to see if that gets the angles right. The slop is only noticable when turning back and forth in parking lots never noticed it out on the road. Heres some pics. The center link is from a 91 F-350, as it puts the drag link ball joint very close to the pass side, the pitman arm is from a Cadilac. The drag link is custom made.





Hope this helps.