With the custom tuning who's the best what r some differences that make one better than others
They all have their minute differences. They're all pretty solid choices. I'm going with Tony Wildman, because the guys I know who have his chips absolutely love them. But there's guys on here that swear by Beans, swear by PHP, swear by DP, swear by Gearhead. It all depends on what you want to do. Research the tuner by searching their name.
It's 4inch off turbo then to 5 inch after down pipe to a 8 inch stack . Might run it out the back of truck so I can put a toolbox in not sure
I wouldn't give up my toolbox for the world.
I've looked into turbo/injectors a little bit
Garret 38r seems to be a good route ?
Garrett 38R is a direct replacement drop in. Alot of guys on here run the 38R with stock injectors. If you really want to up the power you should go with new injectors, too. If you're going to be getting up above 400hp, which you could with that setup, you're going to need to determine if you have PMR or Forged Rods in your motor. Search for the PMR inspection thread.
With stage 1 injectors and a new turbo
Would my tranny be rated for the power?
I think the 4R100 is rated for 1,000 ft-lbs of torque. But she doesn't like to beat on. And she doesn't like much more than stock power if you're driving her hard. You'll probably need to go to forged gears and billet torque converter if you want alot of power and plan on dumping on her or towing with it. You can wait to do that when you actually need a rebuild. My rebuild (all forged internals and a billet torque converter was $2500 out of Moyes in Tampa).