Charles,
It could be that the slicks got hard over the winter and have gone bad to cause the 60fts to go away. But, it does appear that there is too little air in the slicks from all of the sidewall wrinkles on the launch. That could cause it to bounce a little after the launch and then maybe spin. You might also want to make sure that the shocks have the same settings, as maybe one was bumped or turned over the winter.
As far as the twisting, I would check the pre-load of the ladder bars by jacking up the front end of the car in the exact center. I use a smaller floor jack and you can even put a piece of pipe on its side from front to back to have the smallest amount of surface area on the front frame. I jack the car up until both front wheels are off of the ground (if limiters are on the front make sure that both a-arms move the same). I then adjust the pre-load until both front tires are the same amount off of the ground (this would actually be zero pre-load). If the drivers side is twisting up on the launch with it at zero pre-load, then I adjust the pre-load until the drivers side tire is lower by 1/2 inch than the passenger side tire (that would actually be about 1/4 inch pre-load because the passenger side will go up by the same amount as when the drivers side is adjusted down), and so on.
If you check the front suspension and pre-load on the car right now and it is at zero, then you might have a bad shock on the passenger side rear. It could have leaked or gotten air bubbles. You can change the shocks from side to side for a test.
Good luck,
Bill Mitchell