I bought the Gardner Concours package exhaust system for my '69 L78 Nova. It is restrictive, but makes enough power to get on and off the trailer.
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Paul
'62 Bel Air 409/409
'63 Impala SS 409/340 convertible
'68 L72 Biscayne
'69 L78 Nova
'17 Denali 3500HD
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