07-09-2011, 07:47 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
That is a big difference as it goes right through the cap. The keyholes were a cast pot metal that dissolves in a chrome bath. I have reproduced those in aircraft ally and chromed them. The rectangular smooth and ribbed are an extrusion which is more sound for longevity and replating.
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