So without dismissing the idea straight out of hand, there's a few problems with it that i'd be worried about.
1: NGC controller in the SRT. are you carrying it over to the Exige? How will you do the gauges? The senders for the toymotor and all the canbus, etc goodies aren't gonna play nice together.
2: Weight. The SRT trans weighs a hair short of 200lbs. The SRT motor isn't light either. How do you plan to mitigate the weight concerns with this motor?
3: I believe the SRT motor's wider. I'll do some measuring, just to save you the trouble since I have a Stratus RT motor with a T850 literally inches from my Lotus, but i think width wise you're screwed as well.
4: The SRT coolant ends are gonna spit right into the firewall and since they're plastic, they'll be a real pain to reroute. No welding and relocating here.
5: Expect to use a different manifold, all the Neon kits i've seen have the turbo way too high.
Don't get me wrong, i think it's doable, and I don't neccesarily even question the wisdom per se. It's a lot of money to reinvent the wheel though, and at the end of the day, no matter how much power you make, you'll take crap for it being "just a neon".
Trust me, after swapping Subaru drivetrain and engine into a Neon a few years ago with my roommate, that's all we've heard since. "Why would you do that?!" I totally grasp that its the size of the hammer, not who makes it, but the questions WILL get old after a while. I warn ya now.
