yea i have seen you give alot of really bad advice on a lot of diff posts, but this one is the worst, my old cobra headed 85 with a letter cam and 10 lbs of boost on my old f0x car was a monster, the tfs cam is ok but there are better ones. i dont care what anyone says about the ford cams the f303 cam is one of the best cams you can put in a 5.0. and i have no problem beating cars with expensive ass head and cam combo's with my letter cam and ford racing heads........, put a f303 cam in the car, you will love the pull it gives you with the blower and it will run circles around the tfs stage 1, the gt40 cobra/lightning heads are a huge upgrade to stock e7 heads. a good set of ported e7 heads barely flow better then them. the cobra cam sucks, and i will tell you my old h/c/i car pulled a stock cobra with a procharger. there have been tons of people putting gt40 heads and intake on gt motors and run way better then the cobra's do stock,The Cobra heads flow like an extra beer fart over the GT heads. It's not enough difference to even consider it. The Cobra cam is bigger than the GT cam also, which compensates for the extra flow. So you are probably gaining even less swapping a cam on a Cobra vs. a GT.
Kurt