In October’s I purchased a 1971 Duster with a 383 and 727 auto. In the spring I had the car dyno’d and it made 230hp/286ft lb at the wheels. I feel these numbers are lower than they should be. I have a 750 demon carb, Edelbrock dual plane RPM intake, headers, XE284H Comp Cam. Unsure of what heads are on it. Any ideas on what I can do to spruce it up a bit?