would need to cut off long before 120.
when i had my 99 cobra, it had a bunch of weight reduction, solid, 4.10's, full exhaust, ported intake manifold, and a bunch of other goodies b time i was done with it, made 324RWHP, i was the better driver, and against my friends 100% stock 03 every time we ran from a stop i would get out about 1 car by 40, maybe 1.5 by 60, then by 80 he would stop my pull, and 100, he would pass me like i was backing up.
the i put a JLT intake, and a borla catback on his car i would get a 1/2 car out on him off the line, but once he caught traction, he was sailing past at about 40, and just putting cars on me, by 100 he typically had 2-3 cars, then started pulling even harder after that. one time i ran it up to 140 chasing him, so i assume he was already to 150+, and he was about 7 cars out.