new engine can't figure out why stft's run so lean...vacum leak?

[dondb]

lq9 stock bottom end, ls3 heads,intake and injectors, 92mm nick Williams tb, 85mm Delphi MAF, spectra cai, t56. PSI conversion harness, and start up tune on 02 silverado ECM. Starts great...idles great...runs very lean. The only thing i have done to the tune is set the injector flow from the 42lb/hr at 58psi to my 65psi fuel rail pressure. Looks like the engine temp comes up real fast from my lean stft's.....do you think this is from a vacuum leak? When i raise the rpm to 2000 notice the trims come down?? Or is my tune just so far out of wack???

[5FDP]

You need to tune the MAF/TB, it's different than stock. Then I'd start tuning the VE aswell.