Those aircleaners came out when people wanted cool stuff and tried everything to make a car aesthetically better. Mode you, I was renting a room by myself. This was the same era that people painted window trim and drip rails, billet engine compartments, tubbed wheels on never driver street cars and Predator carbs on a nearly stock 350 Chevy, just to name a few. It was a bad seller back then because a scoop that looks like an oval air cleaner is sticking up threw it, looks kind what Jc Whitney had in their catalog next to neon fuzzy dice and the chrome tachometer for boats. If all the vintage car speed parts out there, I have no idea on current value. I’ve only seen it twice before, both 4bbl. They were $100’ish in price back then. New to me they offered a six-pack version. Almost wondering if it was for a GM tri-power drivetrain.