6 speed is pretty stout, should be fine. One thing to get your head around, you can’t just put a big turbo on and crank up the boost. 19 psi is about right for a daily driver on pump gas. To go much higher e85 would help, which you don't have. You can do meth injection, which has a few pitfalls. Or run race gas, not great for a daily driver. Get heavy handed with the boost and the first hard pull with a sub-par tank of gas might be the last.