Hi I'm new to GM #s. I need to know what this intake is from and what it would be worth? Part # is 3866948, it also has a I 18 5 number on it. It is a cast iron intake with a holley carb flange and holley embossed on the intake. Any help would be greately appreciated. Time to clean out my garage.

Big block manifold cast on September 18, 1965, so it's for a 66 model. Used on Chevelle, Corvette, and Passenger 396 and 427 cars with the single Holley carb. Anyone else is welcome to take a stab at the value, but my guess is $100, +/- $25.

$50-$125 depending on how long someone's been looking for the date or how bad someone needs the date for restoration purposes.