Re: what is the correct dia. for 837 alt deep pulley
Try 3770245 Group 1.062 '67-'68 Z/28. May also be the same pulley on early solid lifter Chevies.
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Chevelleless after 46 years......but we did find a low mileage, six speed, silver 2005 Corvette. It will just have to do for now. 
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