If you aren't going to get the trans done then just get efi live first....heck if you aren't going to do the trans then just purchase a cheaper used tuner that will give you about 100hp. You can tune efi to run "fairly" safe with the stock trans. It will make it feel relatively fast compared to a stock truck. If you do plan on doing the trans, then just purchase efi now...it will save you thousands in misspent funds...trust me.
The intake, exhaust, front end parts, turbo can all wait....because they aren't going to be a factor till you get the trans done. The programming will get you to as much power as the trans will hold. I had a stock exhaust/intake and dyno'd 466/8XX with them, and egts have rarely an issue even when towing. Heck with the tow tune I used last week you don't even need the gauges, I couldn't get the thing to go over 1200 no matter how hard I pushed it and I was towing 17,0000pds.