You own a mid 9 second car.. that is really fast, regardless of what the internet says... one important question: Have you ever driven a car with bias ply slicks at low air pressure before? They hook amazingly well compared to drag radials, but they have very different feeling at high speed. I am far from an expert, but my low 10 second car hooked very well with 28x10.5 bias ply at 12 psi on test and tune tracks... but made me a bit nervous at 140 mph... when I tried 325/50R15 drag radials it felt like cruising on the highway with one hand on the wheel at 140... but did not hook well at all... just my 2 cents...