^^^^
Thanks for posting the pic for me Dave, couldn't figure out ho to do it.
Secondary shock absorber is to fine tune the suspension, they use them like that on Trophy Trucks. It also kind of acts like a hydraulic bumpstop to keep the spear point steel bumpstop from piercing my axle housing. I used a stainless bolt and a nylock with some oversize washers to hold it all together. I went with stainless because it's got the best corrosion resistance. I can't take the credit for the design, some dudes on the interweb told me about it.
The math for the link suspension from the website I used was a little much for me. I was able to talk to my son's "core" math teacher about it. She assured me that "close enough" would be just fine as long as the thought process was correct.
The u-bolt mount on top of the differential was my idea. I doubt you can tell, but it was left over from when I took the leafsprings off. I just cut the threads off the ends to make it look custom. The u-bolt does two things, I'm going to use it for a limit strap mount. I found an old nylon belt with brass ferrules, I'm going to use that for an "adjustable" limit strap. I looked into it, that's kind of the same material that they use on Trophy Trucks. The second thing is it'll act as a stiffener. I think I might have gone just a touch light on the angle irons I welded together to make the square section tubing for the upper link mounts. I used a 3/8" grade 8 bolt for the links, I read they are the toughest. They were more expensive, but I figured I'd step up for the best, no sense in cutting corners at this point!