Putting cams in a 4.6 ohc engine is far from a cost effective way to get more power. The cams are expensive, and labor intensive, all for minimum power. If the engine was getting rebuilt, ya, they are probably worth the trouble, but with the engine in the car, tearing it down to a longblock would not be worth it. Basically, if someones goals are 425rwhp+, the saleen blower setup is not the way to go, nor is it finally wise to drop loads of money on parts to make it better. You can sell it, slap a kb or vortech on there, and easily exceed the numbers you can get with the saleen kit.