lowering 60 foot time

I think Adam may have hit the nail on the head with the cam in your combo. That cam really likes to see a high final compression ratio and lots of rear gear, along with the high stall converter. Changing the cam might be a little drastic in the search for a better launch, but you could try using a 4 degree advance key to bring the engine torque down a few hundred RPM. If you know what your piston to valve clearance is right now, it would really help in deciding if you should try this or not. The other thing that might help, and might be worth a try at the strip, is smaller torsion bars. Good luck and keep us posted on your progress.