They'll tell you that it isn't the case since they don't sell a MW intake. If they sold a MW intake then they would tell you that you needed it.

If you want to make power then you need a MW intake. If you are okay giving up some power then a std port intake will work on a MW head as long as you have enough material to keep the gasket sealed up. I've tested this on the dyno before and there is a difference in power in a race engine. In a street engine it might not make any difference at all.

https://www.motortrend.com/how-to/dyno-day-trick-flow-270-mopar-heads/