This brings back memories. I remember some years back my girl griend had a 340 Dart and wanted me to race it for her to see what it would run. Well my brother went with us and I let him drive it first. His first pass was 13.87 @ 104. Afert 4 passes he worked it down to a best of 13.54 @ 105. Now remember this was with street tires that would go up in smoke if not driven right. I jump in the car and made one pass....13.49 @ 105. Well my brother comes up to me kinda ticked off and says ......what did you shift at ?? I said I dont know as I never looked at the tach ! That ticks him off when I do that but it is the truth. I just shifted by the feel as when it felt to be about done in each gear I shift. That makes a good starting point for me and I can play around with shift RPM from there. But many times my seat of the pants was on the money. Ron