07-13-2019, 06:01 PM
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CC Member
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Join Date: May 2013
Cobra Make, Engine: SPF 289 Street
Posts: 209
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Not Ranked
The OE tracks are made from period British Butter. If the lower track fasteners get loose, or were never tightened properly, movement will work harden.. then crack them. I suspect that’s 100% of the problem. If they are bolted down properly, nice and tight, no cracking.
It historically has been a PITA to properly tighten the lower tracks on both 289 & 427 cars. Many original owners half assed it. I have seen that in person.
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