I want to change the front shackle frame bushings on one of my 1-tons. The only problem is GM discontinued these bushings, and no other polyurethane bushing manufacture specifies a front shackle frame bushing for a 1-ton. I found a set of Energy Suspension bushings, I think fit it, but their help desk people cannot absolutely verify this. Without taking the front shackle frame bushing apart, I have no idea if I can get this job done or not. Anybody have any experience with 1-ton front shackle frame bushings?