A 120 tune from a good EFI live tuner would most likely be fine on your stock trans, I've run worse on mine and she's still holding up *knocks on wood*. The stock bottom end is good for a lot more power than you'll be making with a stock turbo/trans. These aren't Ford's, either, you shouldn't need to upgrade head studs any time soon, but if you're taking the heads off for any reason, you may as well do It while you're in there.
2003 Chevy 2500HD D/A ECSB 221K (Sold)
EFI Live DSP5 (thank you to Dustin and Idaho Rob @ATP Trucks), batmowheel & BD wastegate (thanks to MrManners @ Synthetic Motorsports), Kryptonite tie-rods, MBRP downpipe and 4" straight pipe, 33" BF Goodrich A/T KOs on H2s
2007 LMM/Alli CCSB 4x4 (Sold)
EFI Live and downpipe/5"
2007 Grand Prix GTP (needs headers and s#!*)