No idea on why, but you could just knock that stud out and put a longer stud or a bolt in it with a spacer.
When I put mine on the 99 I left out one rubber piece then had to use impact air wrench to get the clamshell to close properly. No way I was going to close that gap with 1/2 inch breaker bar and a cheater. I had a spare set of clamshells handy so I was not worried about breaking anything. PS those springs are still on that rear end today sitting in the back of the shop waiting for the next van. No way. I’m taking it apart.
I had no problem, the original unbolts have plenty of length left.Did yall replace the ubolts as well or did the lack of threads cause any problems? I am about to replace my springs with the 22 1195hd and tryin to be prepared