Neuro
Very nice choice of wheels Sir! Please keep us upto speed on what happens.
Has it got all of its mechanicals? Or is it missing some fairly substantial parts? If so, excuse me for my heretic comments, but you might consider putting in a high power atmo jap engine while you sort out the originals. That's also help you dial in the rest of the car, suspension, brakes, electrics etc. And you can always enjoy your Alfa while you're at it.
A quad throttle EFI motor should be pretty close in "feel" to the original Alfa twin-carb (I'm assuming that yours is non-American market - thus the absence of EFI)
Regards,
Sami