MSD 7-AL with 2 step

Practice tree will help reaction times and lots of practice.
I think what they are trying to say is going from a foot braking the car -coming off brake pedal VS's going to a 2 step helped.
A 2 step sort works like transbrake kind of . Stay on it too long and you hurt the motor.
NHRA Stock races use 2 steps -well did
Most Foot brake classes will not let you use them.
It just a box that goes into a MSD box 7al or 6 box and has high RPM spot for a chip and Low RPM spot for a chip . Put a button on the brake pedal or on the steering wheel
attached to low RPM active wire -put the loud pedal to the floor and it will hit the chip -low side -last yellow let go of the button and launch!