The most popular engine we build is a 440, KB237's, stock iron heads with stock size plain valves, the SUMMIT 6401 hyd cam ( one of the best street grinds ever made), stock intake, stock stamped rockers--we polish it off with a well tuned distributor, well tuned carb and away it goes! Manifolds or cheap headers and you have an engine that has giant TQ, well over 400 HP and will run like the Ever Ready Bunny! It will MELT tires, tear second gear up and cruise to any spot in the USA with ease. Guys that have them LOVE them! I have built my fair share of big inch inch pump gas monsters and while impressive on the dyno and at the strip it is almost impossible to hook it to the street. The Mopar legend was made with nothing more than that.
My all time favorite is still a 340 4 speed A Body with some gear....so I understand where you are coming from.