Seems we tell the upgrade story to every builder. 318 < 360/340 < 408 < and so on. What I find ironic is it seems just a few of us actually take our cars to the strip, or horse around out of town, or show interest in racing in general. Question: Is your "performance upgraded" V8 actually asked to use the upgraded performance? Or would that stock V8 being truthful be plenty for your driving habit?