Can someone please school me on 340 air cleaner

Details are ... is that Mopar parts generally cost 3 to 4 times what the mass expanse of GM parts cost. We were considered the "poor boys" club in the 70's, so it's our turn to be the most valuable! LOL
Im elitist so i get it. And there are ten ways to speculate how we got here but however it happened, CPD is worth more now than the other two. And i feel that just like anything in life, either be in or be out. And i'm all in so ill work harder and ill pay more to stay in. Thanks to everyone here who has or may someday help me find my way.