Hello! I am about to add a Department of Boost GT450 supercharger on to my 2006 Mustang GT this year, just waiting for group buy to come in. That being said it is time for the stock rims and tires to go. This car is rarely driven it will be a weekend warrior, it will be street and track use, dry conditions only. I am considering AMR staggered 18x9 and 18x10 rims. I want to use Nitto NT555R drag radials in 305/40/18 in the rear for maximum straight line performance. I do not do much hard cornering. When I was talking with DOB about my setup they suggested a 255 or 275 in the front. I found a Nitto NT555 G2 in 255/45/18 but using a tire size calculator puts this tire at 27" tall and the rear at 27.6" tall and the OEM is 27.3". I know going off from the OEM will make the speedo a little off but what about the staggered difference in the front and rear? Is this a concern? Is there something closer I should look at?