I had a stock HP 440 1969 motor. Car had MP electronic dist and a factory six pac. Car run super with stock cam. Installed a 509 and car turned into a dog. Was a 4 speed and yes it would roast the tires but a lot less power then stock cam. We tried a lot of things including timing. Shop that installed the cam did it the old fashion way dot to dot but 4 degree advanced. I sold the car because it pissed me off. I've come to the conclusion that those 509 cams really need to be degreed in not just dot to dot.