Add 273's, 340's & 360's to the "318 Race" ?

Take out the “X” block....
Good topic, and thanks for bringing it up. Is there an advantage if the cubes are no larger than a 340 +.030 or .060? Should there be an "extra" deduction for the X block? Without arguing, let's let others chime in....
And rumble, let's us know why?
And Yellow rose, let us know why?