A body gas tank.

I think it fits just fine, but the later tank may have an extra vent tube on the front that you don’t need. You just have to figure out how you want to deal with that vent tube if it’s there.
My new tank had the extra vent tube in front, I ran it up in high in the trunk, w/ a couple of coils on it and back down thru the floor to the bottom of the frame level. Also took the original out of the frame, to run along side it. Haven`t had gas come out of either one yet .