Street Gear Poll

And the 27 incher;
Will have a bigger better footprint with a taller more flexible sidewall, which
may help the 383 hook;if you can't go wide, go tall
And can run on less tire pressure, for a smoother ride
Allow you to run flatter rear springs for corner control
May give you the popular front down attitude, which, on a streeter,helps traction nothing.

275/60-15 is about 27.99
275/50-15 ...........25.83
255/60-15............27.05!!!