13.90 With Problems

Got a new toy last Friday, a G-TECH PRO. Decided to try out the truck before I made any more mods. Only got one chance on Saturday because it is very hard to find a stretch of road that I can make a run over 100 mph. I read what 9 SECONDS posted about slipping the clutch, well it sounds good in theory, but making it work is very difficult without a lot of practice. I launched too hard, lit the tires, then tried to slip the clutch, tires stopped spinning, then let the clutch out again and fried the tires again, finally hooked and shifted to second, no problem then missed third ( IMAGINE THAT!) finally found third, then fourth. G-TECH said 13.99 at 100mph. I was happy that the first timed run was a 13 but really pissed that I missed third. Sunday I tried again with a buddy on board, launched better, spun a little and missed third AGAIN! G-TECH said 13.90 at 103mph.
Next project is going to be torque strapping the motor down, because when it torques over, the shifter goes with it, and when I try to make the third gear shift, I shove the shifter to what should be third, only to find out I just hit fifth. I'll let you guys know if a torque strap helps my problem, and what I used to make it.
Later,