Hi, im new to this forum, names matt me and my father currently own a 72 chevelle, with a 396 bored to a 421 CID engine, right now we are debating what kind of air induction system we want, the 2 inch stock SS hood with the flapper on the cowl of the hood with the snorkel style air cleaner, or a 4 inch bolt on cowl induction with a velocity stack air cleaner, we have a rochester quadra jet 4 barrel carb i was told it was a marine carb im still learning so pardon my ignorance to anything that doesnt exist, and please instead of making fun of me help me out on the correct word or name or style of the product. But i was wonder out of the two the first option being the most expensive and the second being the least expensive. But if anyone has a better way to get air to the engine with out making any serious mods to it. Thank you.