His shortcoming would be restrictor plate tracks ; where Lewis would finish a mediocre 30th place on average .
Dirt tracks helped to contribute to Lewis ' best career finishes ; with him finishing an average of tenth place .
Lewis ' shortcoming would be restrictor plate tracks ; Lewis Lewis would finish a mediocre 30th place on average .
Dirt tracks helped to contribute to Lewis ' best career finishes ; with him finishing an average of tenth place .