The '70 Formula is a factory RAIII , so has it's original factory functional hood. The '71 455HO Formula wasn't ordered with Ram Air, so came with the dual snorkel/dual heat riser air cleaner. I added the Ram Air to that one as it already had the openings cut out and the correct repop screens installed. Mike Sparks sold me a correct original '71 F-body RA air cleaner with the studs on the flapper housings.
Dennis
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