How much difference will it make?

Ok now that I'm up to speed on this thread.
This is what i would do with your car if it was mine and wanted to keep it mostly street with drag potential.
your not making enough power to have traction problem, in my opinion.
First: Get longer rear shock.......or prove that you have a "lot" of downward travel after your remove the bottom of the shock at ride height.
2nt: Disconnect front sway bar and safely move, out of the way of the suspension. because it has SS spring remove the rear or disable the rear sway bar as well. That It!
There has been plenty more good ideas suggested.

I feel this is all that you need, to get a good 60' time.

let us know how it works for you and what you decided to do.