Ill tell ya what, I ran a 12.4@110 with your mods. Granted that was with a 1.61 60ft. Shift at 6K. It helped me so much esp with trap speeds. I would gain 3-4mph shifting at 6 instead of 7k. I was protuned @312whp. So HP is about the same. You will get it with practice for sure. Let Frank take a spin down the 1320 with it