Moog camber kit junk?

many years ago, when I was still an alignment tech, I discovered that the Moog bolts were TOO LONG, and/or the flats too short on the threaded end. Thus when I tightened them down, they would not hold the adjustment. My solution at that time was to go to a farm-supply house, and get hardened washers, one for each side. One went first-on/under the head and the other last-on/under the nut. theses were thick washers and I gained more room than I needed. Thus, I never had a come-back.

From your experience, it seems like Moog has now gone the other way, making the bolts too short, and/or the cams are just too thin.

Since you are a welder, what's wrong with just tack-welding one of the cams onto the bolt head? and orienting that side outboard, to where it's easiest to adjust.
If the kit supplied spring-type locking washers, throw them away, to get nearly a full 1/8th more bolt; and just Blue loc-tite the nuts. I mean; that's what I would do.