Red,
Welcome to SDD. DP tuners can set you up however you want to be set up. Just tell them what you want. Obviously if you want to be tuned for 140 extra horse and have your foot in it 24/7 you will decrease the life of your engine. But that is ALL controlled by the throttle peddle. Regardless of brand, the different chips or tuners wont hurt your engine if you drive it sensibly. You need to make sure you have proper modifications to support what ever type of programming you choose though (ie, gauges, intake,exhaust,injectors,tranny mods..... etc etc..)