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Old 09-05-2013, 03:12 AM   #122 (permalink)
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Define 'by design'.

The stock steel heads were milled to increase compression, the aluminum heads already had the smaller pocket over the valves. 14 to 1 sounds about right for alcohol. Look up "Hadacol Boogie".

The design limitation of the flathead is constricted breathing and the solution is a GMC 6-71 supercharger. With that it will match an OHV V-8. A blower and Ar-Dun heads was the best of both worlds.

Or maybe a turbo, MSD ignition and a 4-speed box? One of the nice things about a flathead, beyond the narrow overall width, is the exhaust is routed through the block and so they run really quietly.
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