Re: What Aluminum manifolds were available in 1969?
The C427X is very similar to the L72-L78 intake and flows similar numbers from what I have been told. The Tarantula small block intake came out around this time with some pretty wild power gain claims. Check out some of the old magazines. Weiand and Offenhauser made aluminum intakes as well.
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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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