Help!!!rare airbreather.. 1971 340 a bodie!!!

Never heard of this before, the lid looks like has been cut, I cut the top just like that one time and it looked identical. Infact, I think i remember this very same air cleaner for sale on this site before......

Got any factory documentation or early pics of it on the car? As far as part numbers go I don't think many Mopar air cleaners ever had part numbers.