I've got a 1984 Mustang with a 1994/95 5.0 and 1991 intakes/throttle body/mass air. The engine remains stock. I have upgraded to an 8.8 rear end with 3.73s, added h-pipe and flowmasters, added underdrive pulleys, k&n filter, 155 gph fuel pump and adjustable fuel regulator. My AOD is shift kitted and built to handle up to 500 hp. I am thinking of upgrading to a E303 cam, trick flow idle to 5500 rpm intakes, 75mm throttle body, 75 mm mass air, and cold air intake kit. Does anyone think I need to upgrade injectors? Does this sound like a good combo to add? What kind of horsepower increases can I expect? I'm probably going to go with 75mm on the throttle body and mass air because that's what the intakes are designed for. Any ideas, suggestions, or advice would be much appreciated.

I've changed my mind on the trick flow intakes. I got a like new polished 70mm throttle body and original 93 cobra intake (which flows better than the new ford racing cobra intakes). I can always rework the intakes to get more top end. I'm sticking with the E303 cam. I've chosen the 76mm c&l mass air. I also snagged a set of GT40 Turbo Swirl aluminum heads. These heads would allow me to go with a much bigger cam, but I wanted to keep decent "daily driver" driveablility, and since I live in california, wanted to stick with emissions legal upgrades. I will repost once I get all of this installed and let anybody interested how much of an improvement I got. I'm expecting 75-100 hp from it, which would put me in the 325-350 range...not too bad for my light 84!