The recommendation of the dyno tune is the best advice your going to get. However, I haven't seen any tuners that use the fuelpack. Top 3 in that area are TTS, Powervision, Thundermax.
Listen to some M8s and pick the sound you like and go that route, then get it tuned by a reputable tuner. Done! Then ride the hell out of it
2009 Road Glide. 16 in Vindikta Wild Cats. Aquatic AV, Stinger 700X4 to MMats PA 601, Audiopipe horns.
Ground Zero 7X10 in the lids w/ sspn.4 1000d, tuned with DD Audio DSI-2. S&S 106, lifters, push rods and AC. Drago 2. CycleRama 575. Progressive monotones -1in. 12in. HD adjustable rear shocks. Painted inner fairing. Tuned with TTS. Blacked out!