Re: Smog
Car Craft September '68 drag tested an L78 4 speed Chevy II. The engine photo clearly shows the AIR pump set high on the passenger side. The car ran 12.85 @110mph after adding headers, 4:56 gears, slicks, fuel pump, and tuning. Not too shabby. I believe that the cars that came without AIR pumps got exhaust manifolds not machined for AIR fittings.
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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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