Ford 272 C.I. runs low 11's. Why do Mopar guys need 408's?

"NEED"...???..
I think 318willrun's point anytime anyone wants to build anything other than 360/408 including big blocks and even 340s which are told to sale a lot of the time. All these V8s 318-543 can build the 300-600 hp most people will build pick your poison (rpm/powerband).