Someday, David Currier Jr. hopes to drive a race car bearing the emblems of brands like Mountain Dew, Craftsman, and The Home Depot.Right now, he’s happy driving on a late-model circuit in a Chevy Monte Carlo with sponsors that include Cape Cod Biochemical Co. and Lake Norman Sewer & Septic Service — his father’s business. David Currier Sr. used to own and operate Currier Septic & Drain Service in Middleton, Mass. He moved the family to Denver, N.C., in August 2006 and started a new business so that David Jr. could be closer to the world of racing, for
