It's a good intake on the right combination. However you have a 383 in a heavy car, with tall gears. That makes the engine acceleration rate slow. If you switched to a dual plane like a regular non RPM, plain jane Performer it would increase the air speed in the ports and give you more torque (which is what moves things, not horsepower) You could port matched a standard Performer to your heads for even better results. Air speed and the engine acceleration rate (how fast an engine can rpm per second) is what makes a real performance engine. Sometimes you have to work backwards to go forward and I really think switching to a dual plane intake will give you a better experience than changing the cam. Even if you put a roller in that engine I still think a regular Performer will yield better results in a heavy car with tall gears.
Tom
