I currently am running 215/45-17's. I have a 3 finger gap on all four corners after rear coil overs and 1.5 coils cut in the front and would like to close that gap a little more with taller tires. I have hptuners so can play with the speedo calibration. I have a 2000 grand prix gtp pcm and I have phonedawgz speedo filter thingy.
86 SE Convertible 3800sc 4t65e HD(2002), Gen V, 3.3 pulley, SD headers