The original '69 & '70-72 dual snorkel A-body aircleaners are 1/2" drop from carb flange mtg area to the bottom of the aircleaner assm. Factory aircleaners like the '70-74 Fomula RA aircleaners & regular Formula & T/A aircleaners are 1.5" drop.
The original cast iron 4bbl or 2 piece intake (RA4/455 HO) fit perfectly as they originally did. Where the OEM aircleaner fit problems will pop up, is if swapping to a much taller intake like a Performer RPM or Victor /where the carb mounting pad is much higher.
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