I ordered a set of the 3.2128R's which is the correct application for Red Rear leaf spring bushings for my 89 blazer. The bushings for the leaf springs work fine however the shackle bushings are too big. I called Energy Susp. and gave the part # off of the bushing and it was the correct bushing #. So did GM use different shackles? Energy Susp. "claims" to sell about 60 of these a month and have never had trouble with them. I used a caliper on the two and the outside measurement of the bushing is 1 9/16" OD, the Caliper is 1 3/8" ID. Thats a difference of 3/16's and there is no way (short of cutting the bushing) that these will fit. Anybody else have this trouble? The truly sucky part is I had to drop $50 on a set of new shackles with bushings just so I can get my blazer back on the road.