Air Cleaner Question

I was given an air cleaner that is a big oval and looks like a six pack item but has a single 4bbl base. It has two wing nuts that hold the top to the bottom. The top is orange and the bottom is black. the bottom looks like it is supposed to be sealed to the hood and has a single nipple coming off of it at a 90 degree angle. Is this for a 340 duster? Is it worth anything?