FWIW...I've been 1.320 to the 60' on motor only footbraking my car. Cal-Tracs, mono springs, Rancho 9 way rear shocks, old Lakewood 90/10s up front I slightly modified by changing the oil in them. 295-65 drag radials at 20 psi. Best of 9.54 at 140.4 mph. No pulling timing or anything, just flatfooting it w/ all it's got.

I've been 1.30 to the 60' on nitrous. I've been quicker, but the 60' beam got tripped w/ the back tires...should have been a 1.28-1.29 sixty foot if the frontend was down. Now w/ Viking DA shocks at all 4 corners and 1" less front travel. The shocks made a big difference getting the car to hook on the nitrous.
Same otherwise...295-65 drag radials, Cal-Tracs, etc.
I've been a best 1/4 of 8.91 so far, but my current 1/8 mile times are a couple tenths quicker. Should get a new 1/4 timeslip soon.