How much difference will it make?

Handling mods like you have are on the opposite end of the spectrum when compared to drag racing. Leaning one way compromises the effectiveness in the other.
Not only do sway bars limit weight transfer, the torsion bars do too. Thinner bars actually store energy because they are twisted more and will "unwind" more and easily. Lots of shock options including single & double adjustables that can help control what the front and rear suspensions do. SS springs are naturally good for drag racing, but are restricted by the rest of your set-up.

Optimal hook will still take a lot of tuning. No easy answer for the street or strip because each car set-up is differnt, including engine, trans, gears, weight, etc.