Sounds like you have increased your airflow quite a bit, but with no increase in fuel. I'd try starting with 130 main jets and see if things improve at WOT. A lot of people also run the Thunderbird sport needles which fattens up the midrange nicely. 130's may end up being too small, but would be a good place to start. I ran through a number of jetting combinations before settling on a solution that worked well with my setup. Also, others on the board may have more experience with your exhaust setup.
