Anybody ever heard of KalMaker? They're in Australia, and make a real-time programmable modification for GM ecm's. I corresponded with them, and we went over some possibilities about our cars. Check out their site. www.kalmaker.com.au. Alan Gibb at Kalmaker says it'll work with our cars, but not with real-time programming because of a lack of high-speed serial data from our 7148 ecms. Anyway, it seemes like a possibility.