Get the right chip for alky. Then, fix the exhaust leak, as this will cause slow spool up. Tires tend to lose their grip (get hard) when they get old, so you may benefit from new tires.
I ran a stock long block with a TE60, and a dutt neck IC to 11.91@113, but it took 25 psi to do it. After that, I developed an exhaust leak. I kept trying to adjust, but it killed spool up. At 28 psi, the best I could get was 12.00@118 due to slow spool up/exhaust leaks. 5mph more, and still couldnt get faster.
Do yourself a favor, fix the exhaust leak, make sure everything is running top notch, then work on the launch.