I have a 2006 Dodge 2500 with an Extreme Power Puck (work great!). Can I stack this with a Predator?

Will do. Is there anything special I need to know before installing it on my 06 Dodge 2500.

I just received my new extreme powerpuck in the mail and I'm getting ready to install it. I see that there are no preset settings on the switch. How will I know approx what hp setting I have it on. I want to set it up to use mostly for the best mileage gains. Where should I set the dial.