Got my 5/8" metal tubes in so I was able to replace the 5/8" bolts with them and use 1/2" grade 8 bolts. I got the 0.509" ID tubes so the 1/2" bolt can slip through. Now I can unbolt the bolt and slip shocks off without too much hassle. I'll eventually have the tubes welded in place (they are just a tight fit in the 2" square tubes) along with proper spacers so they add strength to the support instead of the washers just hanging around.