Based on your post..I assumed this 289 was in a 65? If so..on the rear end tube there are some "perches" (one at each end) that the entire housing rests on the leaf spring with. I box welded mine in because the first time at the track with N2O the welds broke, and just spun them around the housing, which of course snapped the "U" joint, and the driveline wanted to come in to the cab with me. I was lucky to have a drive line loop...
Ron
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