The 1973 Hurst/Olds had the first electronic digital tachometer ever, and the Nassau Hood Duct

 the Hurst-supplied Digital Tachometer was bolted onto that dashboard and was optional, but it was available from the factory, and even had a bit of memory, where it stores the highest RPM recorded

and the weird hood scoop was called the Nassau Hood Duct, just raised louvers glued onto the hood. Looks to me like a rip off of the 1967 Coronet R/T hood louvers, also useless, but reversed

https://www.theautopian.com/the-1973-hurst-oldsmobile-had-one-important-first-and-one-very-weird-little-mystery/