440 /super charger add on ?

He must have an old vintage intake. Some were fabbed from aluminum 4 barrel intakes with an adapter plate welded on. Not uncommon back in the day. If you buy a new blower intake for a 440 these days it's all one piece that seals the top of the motor. No part of the old metal gasket is used, period.

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Dyers photo below....

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Here's an old school one that would require a valley pan...

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