My car had ZQ9 REAR AXLE PERFORMANCE PACKAGE on the GM sheet from George , but
I’ve never been able to find any GM info on that. Just assumed it was the 4.10, but if anybody has info on that ???? That would be great..
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Lately into Beaumont SD's, 66,67,68 and 69 , including a 69 2 Dr Post Beaumont , an L78 2 Dr Post Chevelle LS6 Chevelle's, LS6 and L78 El Camino and Camaro fan ! Also 2 Cdn Documented COPO's, a COPO Camaro and COPO Chevelle Love GM Products
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