MSD 6AL-2 Ignition 2 step rev Control help

what 2-step do you have?? Should only be two wires. A ground and a hot...activate the 2 step however you want. Like said, with a trans brake or just a momentary switch or a toggle. When you throw hot to the 2-step you engage you low limit rpm. I use a 8672 for top end and a 3000 chip for the launch/burnout.