The lower control arm bolts for 79-98 are 3/8'" thick, the 99+ ones are 5/16" thick. The 5/16" bolts were too thick to fit into the bushings. My buddy and I found this out when trying to put in a set of FFR lowers in his car, the uppers didn't have the same problem. We are going to try and use a set of 3/8" thick X 4 1/4" bolts to see if it will work (grade 10.9 if we can find them). I don't see why it wouldn't.
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