I use to own a NHRA legal stocker that ran 11:20 at 119.MPH and change, it didn't have a adequate fuel delivery system on it to run any faster I found out after I sold it My message is I also agree on getting a better converter. I was offered a TCI on a racer deal back then and had to have it modified by Munsinger several times before it work as well as a Turbo Action. Take the time to call several different GOOD conveter companys and tell them about your combination and see what they recommend. I will bet money that the Turbo Action will be better than most and as good as any of them Your MPH is better than your ET and 60 ft. times, is the car spinning the tires now? If so fix that first before making any other changes