The correct carb would be a Rochester 4mv. Someone else in this forum will be able to get you the part # I'm sure.
As far as the original air cleaner, good luck! I think it's pretty unique and hard to find. To my knowledge no one reproduces it. It's a black base with the snorkel facing the driver's side. The top is chrome with the red 350 sticker. (the stickers are readily available from classic industries and others.)