there was a tech question article you can look up at HRM.com thatcovered the different center to center distances of different dual quad intakes for a Big Block Mopar and the street hemi intakes. All I remember was the center to center distances were all different. That one air cleaner base shown pictured with the other stuff at the start of the post looks like one used in super stock with an open element. I’ll have to dig out my Maximum Performance super stock book to confirm but it was similar to a street hemi intake but used square bore 750 cfm AFB’s, 1966 and 1967 Coronets and Belvederes. It may be a ‘64-65 model hemi cross ram intake base, too. There were very few of those made, it had a shrouded chrome cover that concealed the air filter and went diagonal from one carb to the other. It made the super stock hemi look even more menacing, like it really needed any help in that department to begin with...