Your solution looks interesting. It will definatly keep the center link from twisting up.

The thing to remember with the stock Nissan center link is, the bushing will eventually wear even without twisting. This will still lead to some play in the steering. Also the pin is made from a some what soft material. Every center link I've changed has had a bent pin.

I'm am going to do a Rockwell test to see what the hardness of the pin is when I have a chance to go to our other facility. I'm guessing it is quite a bit softer than a Grade 8 bolt.

As for the frame rusting issue I doubt it will have much of an affect unless you park the truck for a while. The constant motion of the block will keep rust from forming.

Good luck with your solution to the problem.