63-66 idler arm conversion to late model thru bolt ?

RustyRatRod said

Well, I can certainly see the difference in design, but I've never actually witnessed any flex there. Have you? I would think you'd need a go pro camera mounted aimed at a dial indicator to see it and I've never done that. So I have no definitive proof......but the theory seems sound. I know millions of early A bodies were built and to date, I've never seen a broken bracket. I've seen a couple of idler arms that the pivot came out of just from regular wear, but none from any kind of fatigue failure.

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Have not witnessed flex myself, however this was the issue when Chrysler engineer Scott Harvey was involved in rallys driving a 66 barracuda. Off issue I have seen considerable K frame flex around the steering box. You can easily see this while having someone turn the wheel lock to lock and just watch the box and hydraulic lines move, it looked to me like more than 1/8 inch. I attach some 3/8 treaded rod to the FRONT nose of the steering box and weld a bracket to the adjacent frame rail, like a strut this all but eliminates box to K flex. It make a very noticeable improvement to the steering feel/response. And yes steering box was bolted tight and no K frame cracks.