Can someone please school me on 340 air cleaner

As said above, 70-71 340 only air cleaners for A and E body cars, and maybe 71 B body cars with 340....but I'm not sure. There used to be a fiberglass repop, but from what I remember they were junk. I have figured out a way to make 70-71 340 air cleaner clones....but haven't had time to fool with it. I need to get on that! lol. Those are running neck and neck with LD340 intakes in the price race! I hope you find one at a reasonable price.