Mopar Engines ~ "Combinations That Should Have Been Made Available"

Imo, what Ma did then was streamline the manufacturing process and leave no room for doubt which motor was the performance motor. For example, after the 340 came out it was the only small block option with a 4bbl. The HP 383 and 440 shared the same camshaft, which was never as potent as the street hemi grind. A 318 commando would have competed directly with the 340. Ma did in a way push this with the 440+6. However with the huge cost and low sales volume of the street hemi she may have left dales on the table by not making a true HP 440, but this would have put the street hemi's reign as king of the street in question.