NHRA Funny Car driver Courtney Force is ready to improve on an excellent 2012 rookie season in which she finished fifth in points. Force is the daughter of 15-time Funny Car champion John Force. So funny car racing is sort of the family business. But that business is expanding now that her younger sister Brittany Force is debuting this season in the Top Fuel category. Courtney offers a lot on her sister’s prep for the season as well as more “war” stories about Dad. Listen…