IIRC the early ch4b intakes came with a chrysler part number and were sold through direct connection as well.
In the 440 intake shootout the ch4b did fairly well.It was down on low end tq compared to some dual planes but did well up top pulling peak hp at a higher rpm than all the other dual planes except for the rpm if memory serves.
I run one on my 496 in my c body because the rpm won't clear the hood with the factory air cleaner and it has much better bottom end than my street dominator(big heavy car).A performer will fit(barely touched the hood)but the ch4b pulls harder up top and rpm's higher w/o feeling restricted.
my 496 shifts at 5700rpm and will zing 6000+ with ported iron castings,small solid cam,and the ch4b intake with ease.It can move some air.The only mod I have done is have it deep port matched by Hughes engines.To keep the comparison even the same had bee done to my performer and sd as well.