yes......don't use the auxiliary injector! Use 8 larger injectors, and/or fuel pump depending on pump capacity
You're saving even more money than you know by not being able to afford a forced induction kit!
As for the SMT6....yes it works, but the tuning gurus have stepped things up a notch with SCT. No need to splice wires, other than wiring in a 2 bar map sensor. Just plug the tuner in, and download a program. The downside is if there are some minor adjustments to make, there is no live tuning such as using the smt6. the program needs to be removed, and reworked by either yourself, or the guy (hemifever)
who sent you the tune. Download the new tune, and away you go.
Now as for boost levels....the first 3 1/2lbs of boost is the most noticeable....stepping up to 5, or 6....I would use intercooling. Any more, and you're asking for trouble
Personally...I enjoy asking for trouble
I ran my turbo at 10 psi with intercooling, and meth injection. While the stock motor and trans will sustain this power level, it won't last. I have upgraded to Sharadon stage 3 transmission, and now have a 370 forged stroker.
I pulled the heads off my old motor, and every single piston was broken, near the top of the motor
I wasn't surprised. I knew for a fact that I had broken a few of them, but happy to see that it was still driveable with all of them broken