if you going to a 65mm throttle body you without the change of heads, cam, or intake manifold you will not feel much of anything if anything. i suggest you save up for a good h/c/i. or do something simple like gears or pulleys if you have not done so already. you can buy a bbk, mac, or ford racing egr plate aftermarket in 65mm. the ford racing one will actually be 67mm.