I helped dyno tune a 408 with Trick Flow heads and a Holley Sniper yesterday. The engine was super sweet with a nice smooth idle and almost 500 ft-lbs of torque. It is going in an A body car so it should really scoot. The owner had gone with the full Holley setup including the EFI distributor and ignition. He'll be able to tune the car with his laptop as he drives down the freeway.