Just call up FP and order yourself a big-T28, Jeremy Brandt ran a 12.2 in his '99 GSX with the FP T28 (I believe his was the older version though.) Plus it's on sale right now for $725 and someone correct me if I'm wrong with this, but it is a direct bolt on for your Spyder.
Info:
http://linux.forcedperformance.net/merchan..._Code=DSM-Turbo