Drag Strip tips and advice needed.

Well, I fixed the head gasket and got it back to the track for the last drag race of the season, perhaps last races at this track. Our first race, we started out well but during a manual shift my son, the driver, heard something and shut it down. 1.735 60 ft time was decent. The second race he put it in drive and let the transmission do the shifting. He slipped a bit starting but it ran well. He said that it seemed to shift from 1-2 at a lower rpm than needed but we don't know what rpm that was. 12.674 was disappointing but we brought it home without breaking anything this time. Only had one more run that my other son drove and he slipped badly at the start, Not a good burnout to warm them up. In looking at the time slips what is good, bad and what needs improvement? IMG_1307.jpg