What about using a set of non ported aluminum stage 2 heads. A decrease in port volume, bigger valves, maintaining velocity. You shouldn't need the rpm for flow then, correct? You would still have excellent flow from a 10 degree head with a smaller turbo that is roughly 20mm smaller than the equivalent turbo that it took to run the OP's goal 14+ years ago. I had to run a PT80 and then an 88 to hit 8.90s. I didnt have