Maybe an other head producer in the game.

I am a SBM guy. I've talked about switching over to a gen 3. But I doubt that I ever will. But my brother has a Challenger 1320 which is a 6.4 N/A. It's stock except for a smaller crank pulley, bigger injectors and tuned for e85. The car weighs 4320 with him in the car. It's ran 7.00 in the eighth, 11.00 in the quarter mile at 124 mph. Thats 636 hp out of a stock 392 ci. Gen 3. That's pretty impressive.