It says, "Ever since I drove a '79 Lincoln with whitewall,
Even before Eminem had any money he still wanted to be a great rapper. The symbol of his being poor is the crappy old Lincoln he used to drive before he got famous. White walls are tires with a white line around the rim, as shown in the picture below.
To help improve the meaning of these lyrics, visit “Rhyme or Reason” by Eminem Lyrics and leave a comment on the lyrics box