If you know enough about the stock ECU, it should be possible to make a rev limiter eliminator that clips onto the ECU board. I've seen this done with some of the imports... although, I don't think it's worth the trouble. Like Tone said, the Interceptor should help some and it really doesn't hurt the motor much when you bounce off of the limiter... gas economy suffers a bit that's all... but then you have a SC anyway so who cares?
Speaking of the Interceptor... Tone, a while back you said the same company makes some gizmo that allows you to calibrate the speedo for different tire sizes and you said you'd look into that... what did you find out?