Here in Ontario, I don't recall ever seeing smog pumps on L34 and L35 cars in '68 and '69, just the solid lifter engines. A friend has a '69 Vetter with the 390 hp 427. I'll have to double check his car as I don't think it has smog either. Can't always count on memory though.
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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.