cheapest way to get hemi 3g going?

ya, came across that.
So tell me, I get that MS3...what exactly do i need for wiring? I mean i am going to be doing my own thing for the car itself, So I just need an engine harness right?
Then its just splice the MS3 into the fuel rails, sensors...fire that thing up?

obviously there is more things, like fuel and what not. But the engine and computer are taken care of. No needing to spend money to have it flashed, just plug it into my laptop.