you are on your way to tens, mph shows you have the power for solid to mid tens. Keep uping your launch rpms till you start having traction issues. as long as you are dead hooking you don't need a different tire, the radials will be quicker as long as they keep hooking. the higher the launch the quicker the 60', you can typically expect double the gain from the 60 to the 1/4 mile time. I found a lot in mine through suspension. you can always come to the dark side and go automatic, most come out with a quicker combo, not always, but usually.
..5.95 @ 115, 1.30 60', naturally aspirated.
1991 notch, dart block 427W, , AFR225's, super vic intake, solid roller, UCC 8" converter, glide, Carbureted E85, 28" radial.