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#1
08-10-2009, 10:35 PM
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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 [email protected] 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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#2
08-11-2009, 12:34 AM
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Re: '70 LT1 Alternator Pulley & Fan Finish
Thanks Chuck - that helps!
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Sam...  
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