Overload spacers for GM

Thought I'd update this old thread of mine with some results . After 5 years of use the rear blocks have worn a hole through the SS band . The fronts are fine . If you look at the rear block it hits the OEM rubber bumper at a sharp point , that seems to be the culprit . I will either tack weld a heavier piece of SS to the surface or replace the clamp . A few in the original thread questioned how long they would last , now we know .

http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/25587998/srt/pa/pging/1.cfm