In '69 Beare Motors sold 3 COPO Chevelles and an L88 Corvette. Our salesman got to test drive these cars and didn't see much difference performancewise. Closed exhaust really seems to choke the radical cammed engines. One thing for sure, The L72 and LS6 are pretty mild mannered around town. If you are doing much driving, low octane pump gas can get to be a problem and won't work at all with the L88. Our L78 seems to work fine on the 92-93 octane gas that we have around here. The Clarys can show you how to make your engine produce some real power.
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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.
