I would get at least 880cc injectors. 550s will not be enough for a 20g. I run MS 1 and built a small circuit to use the stock cluch switch for the studderbox. You can control boost with it also. Look on neons.org they have it all figured out already.

MS 1 or 2 would be fine for your needs so which ever you find would work. I have MS 1 v2.2 and love it but the MS 2 does have a few more features so you may want to just get that one.

98 Eclipse GS Turbo
Built motor - MS2 - Holset hy35 - Zoom Stg 4 Clutch - 57.5mm TB - ARP Headstuds - Turbonetics wastegate - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - 650cc Injectors - Fidanza Flywheel - Cobra calipers w/ 13" Rotors - Oil Cooler - DevilsOwn meth injection

1981 Chevy Scottsdale
1987 Nissan 300zx - Chump Car
2001 BMW 325i