Ok, took me a second to find where they moved this lol.

I will pm you my graph and show you some differences..

I would deff switch to a walbro. Injector wise, if you dont plan on spraying it in the future 310s should do the trick. And also like i said earlier do the intake manifold. The reason i stated a 65mm tb is because the Skunk2 Pro series intake manifold tb opening is 65mm so you are basically matching it instead of having 5mm of air hitting a "wall". Tranny wise either one will work, there will be a huge difference from the ls. Evan and myself run a b16 tranny, which will be better for the track. If you dont mind crusing around at about 3500-4000 then b16 is the way to go. GSR i would recommend if you do alot of highway driving. Although i still avg 30mpg with the b16. But from LS to gsr/b16 it will be night and day difference. The cam choice is really up to you, it really comes down to what you want out of the motor and is it reliable(assuming it is a daily driver) enough to drive a certain amount of miles a week. Im still in that stage of figuring out which ones to get, but im more than likely going with S2S2. Btw is the head ported any?