A little wheelspin is not a bad thing, it takes a bit of the stress off of the tranny and clutch. You want to learn how to modulate the clutch pedal to get the car to leave the line smoothly. When i launch my car (with stock gears) i usually launch it around 4500, and slip the clutch out slowly. I usually get a little wheelspin (mostly from the front tires), then the car hooks up, just be careful with the trottle till the car hooks, then roll into it. If you lay into it while the wheels are slipping a little, then you are coing to create more wheelspin, so just be patient, and practice finding that sweet spot where the wheelspin stops. It takes a lot of practice to be able to launch these cars properly. I can usually pull a 1.7-1.8 60 ft time with this method, and haven't hurt my tranny yet.
Sonic Yellow Bugeye
a.k.a. - "Amber"