67 Column Mounting Issue

My 67 Barracuda has metal isolators on the column mounting bracket that look like they were originally attached with injected nylon or something. From what I understand, this was an early attempt at collapsible column technology. Has anyone successfully reattached these?
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If I end up having to use the 68-up nylon capsules, didn’t they use a special nut that was different than 67? And did some later columns have a jumper ground wire?