Re: 2 step low rpm
 

Robert: In some cases, it may be necessary to tighten the air valve tension slightly when going from foot braking to 2-stepping. It depends on the tension you have as a starting point. It could be that it's tight enough and you won't have to do anything. I would try it as is and if you notice any "fluttering", then tighten it a little. Hope this helps.

Re: 2 step low rpm
 

Just buy an 8735 MSD Launch Control….

It takes 2 chips 1 for burn out and 1 for high RPM, but the Launch Control has dials to set the leave RPM

Easy, Peasy