Don't know what I'm doing
I would say try doing a couple practice launches on clean pavement and read the marks. I think 16psi may be too high to start with. From what I understand, you run them a little low, but heat the snot our of them to get them to stick. There are much faster cars with sticks running them and they are working. If I had to guess, I'd say the rear is too stiff, the front isnt moving due to weight, shocks, and the swap bar. The best shocks you can afford and losing the sway bar will go a long way to helping. I'd like to see a pic of the car too.