Gary, call Kris at Continental Converters (310) 674-1072.
They custom-build them for every application. Probably the best converters for a street-strip Pontiac. Having the right converter can make a HUGE difference in performance and driveability. Continental doesn't use any cheap internal parts, they last.
Just bought my third one from them, I can't wait to put it in my car. Not cheap, but you get what you pay for.
