There is really nothin short in these engines as far as making them a drag race engine. If you want a really aggressive roller cam you need to either convert over or buy a truck or busch engine. The intake valve to exhaust ratio is a little different but, read most of the combos on here they are typically the same as the P7 engines.

Most sportsman drag racers are after big inch engines that don't have to turn real hard. The reason was engines of the past hurt parts when you really zinged on them. They got expensive. These engines basically live forever at high RPM. They don't make the 600 HP of years past but over 800 HP.

Then you get the guy who says the engines have no torque. And look they are running a 408 with nothing heads and no gear ratio. These 408 combos can easily make 600 lbs of torque but run out of air and barely break 600 HP in any adverse air conditions. So when a guy like Bondbob comes out and blast a 5.9 et shifting like a daily driven street car everybody makes excuses for how he misteriously done it. There is no excuse it is simply HP and he hadn't even used it yet. Shifting an engine that only makes 550 torque at 6200. Well he was just starting to see over 700 HP. He had some bad luck and broke a spring now everyone got scared off. Those engines prefer to be shifted at 9,500. That 5.9 ET just turned into at least a 5.50.

I simply want the best of both worlds. An XR or a EEI block and lets pack some stroke under these heads and turn 9,500. SLOW economy and no one buying anything. That is the reason I don't have one and that is the reason others have not either.