Cool, Widing! Good to see her being used properly! A little tip... don't wait for the green light. As soon as you see the amber lights, hit the gas.
I had the same problem with traction when I first ran the 'cuda at an airfield in the UK; I had no traction in first.
Book your weekend off now for the Mopar Euronats at Santa Pod next year; whenever I've been there they prep the track properly. I took over a second off the 1/4 mile time straight away when I was there (15.6 down to 14.4) and that was launching off idle and shifting at 5500rpm.
Can't remember what the 1/8 mile time was at Santa Pod though. Did you get a speed as well or just a time?