Re: 1969 440 six pack Superbee & Road Runner.
1969 440 six pack motors used the standard 3.75 stroke 440 crank & rods with the stock 440 harmonic balancer and used an aluminum six pack intake cast by edelbrock.
1970 440 six pack motors used the standard 3.75 stroke 440 crank & beefier rods with a special harmonic balancer w/extra weight and a cast iron six pack intake made by Chrysler.
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