Looking for help and opinions and comments here. I want a box for pulling that will give decent EGT's. I know I will not be able to run box at full capacity. Looking for about a 75-80 horse gain with the rest of it stock except for 4" straight exhaust on a early 04 555. Will this be possible with the stock charger? Also would like to be able to upgrade in the future to more. Any experience with the Quad Race on 60 pulling? I like the option of having 140 horse for horseplay, but is the 60 horse setting low enough for pulling. Also I'm at 5000 feet elevation, I know this will not help matters.