Anyone have luck with this? I was talking to a guy last night with an 89 Corvette w/ a 396 in it that has the complete F.A.S.T.Engine Management system on it and was able to fine tune every aspect of the car. Is there any advantage to having this system over having a professional tune done on an otherwise stock computer? Jerry W. tuned my car, and it runs excellent, but I was just curious if more tuning could be done with a F.A.S.T. system.