First off. Welcome to stangnet! And as for your MAD horsepower... well, what are you looking to do? N/A (Naturally Aspirated) or F/I (Forced Induction). http://rpm-mustangs.com/cart/home.php?cat=257 The cam on this page, set-up nicely will work good. But let me/us know what your intentions are and then we can really help you out. Again, welcome.
i suggest calling up the company you wish to buy a cam from and talk to them about your future plans/current setup. an aftermarket cam alone will help you out but cams are made for specific applications based on your other mods. for example a cam ground to work with a naturally aspirated setup will not be as efficient on a supercharged engine as a cam ground for a supercharged application would be. id buy the cam to match your setup(or planned set up) but an all around cam will give you some power anyways.