Have you changed anything in the suspension since it was last out? If not, here is my .02

I had the same PS Hemi in the car I just sold, and I know how finnicky they can be. I would start by taking timing out of it, at the hit, so that you can get the car to leave (although it may be a pooch to start off), and than start ramping the timing back in, as you get the chassis figured out. I would share my old launch RPM settings, etc., but, with your big tire, I am sure that your settings are far more agressive.

Do you have a Racepak? If so, what has the driveshaft rpm been in the past, at the 1 second mark? I would back it down with timing, than sneak back up to where the graph is showing it's happiest point.