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Old 08-10-2009, 10:35 PM
CamarosRus CamarosRus is offline
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Default Re: '70 LT1 Alternator Pulley & Fan Finish

Sam, I am not positive as I've never read where anybody has had original parts analized by a lab.
I think that the 70 LT-1 Deep Groove pulley was Cadmium plated or Clear Zinc, and the fan was clear zinc.

Todays platers used a brightner solution after the zinc plating. I'm not sure that was the case when these parts were new, thus they tarnished much faster.

Just my .02
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Chuck Sharin
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Auburn,WA (30 miles South of Seattle)
70 Camaro R/S Z-28, L-78, R/S SS
69 Camaro COPO "recreation"
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