The ball on my wdh needed to be torqued to 450 ft pounds. Fortunately they have a torque wrench at work that could do the job. You should see the size of that thing! The other bolts needed 250 ft pounds. I was able to get a torque wrench to tighten them myself. Fortunately I was able to put the part to be torqued in the receiver and get the right torque. Yeah, it's a lot of force! In my opinion, I would have a mechanic torque it. Ask him first if he has a 260 ft pound torque wrench and if he does, go for it. It is definitely worth doing it right. There is no way to "guesstimate" that kind of torque.