'Richard and I went head to head today and it was a lot of fun,' Langham said. 'Winning is never easy and it isn't supposed to be. But it sure feels good when you pull it off. ... In this job, the only security you have is winning.'
The 39-year-old Langham had a 20-under 264 total on the Willow Creek Country Club course. He earned $90,000 to jump from 57th to 20th on the money list with $170,966. The top 25 at the end of the season will earn 2008 PGA TOUR cards.
'I've still got a long way to go,' Langham said. 'It will be nice to take a sword to a sword fight instead of a knife.'
Langham, a member of the PGA TOUR in 1996, 1998-2002 and 2005, also won the Nationwide Tour's 1993 Permian Basin Open and 2004 Rheem Classic.
Johnson, from Wales, matched Langham with a closing 68. Edward Loar and Australia's Mark Hensby, a PGA TOUR member making his first Nationwide Tour start of the year after failing to qualify for the FedExCup playoffs, shot 67s to tie for third at 17 under.