By the way, would doing this hurt the transmission?
street tires are a lot different than slicks. they actually loss grip when they get hot.
try this, jack up your truck, leave it in 2wd, run it up to 80mph or more and have someone drop the jack
the tranny or drive shaft or axle is about to become many small pieces
w/ modern slicks all you need is a haze from them to make them ready to go.
I used to do the funny car burnouts, they're a blast, 140-160 mph tire speed and get stopped at half track and back up.
track prep is most important.
when I worked the starting line at IRP it was 99* and sunny, I used a lot of VHT and my shoes would stick to the track like glue. didn't see a lot of tire spin unless it was guys running mud tires in 2wd.
hope you get it figured out Keith. what do you have done to the rear end as far as bars. what shocks are you running?
set up a video camera on the tires, put a white line on them, so you can see what they're doing when you launch. you should see a lot of wrinkle and a little slip. also see how much the front end is unloading on launch too.