200 units according to Roush.
Mark Martin has never won a Nascar championship.
It depends what customizations a person has made on their car, but a stage 3 Roush would destroy a GT. A GT (at least for 08) has a 4.6L engine and a Roush (428r) has a 4.6L engine along with the Roush Super Charger, Roush Suspension, Roush Breaking, as well as many other smaller differences. Overall a Roush is much better than a GT because what the Roush company does is purchase GT's and then upgrade a lot of it.
Through 2012, Mark Martin qualified for 28 Daytona 500s.
Mark Martin never won a Nationwide Series championship (formerly known as the Busch Series).
Mark Martin won 40 races during his Nascar Cup Series career.
One time. Mark Martin married Arlene Everett on October 27, 1984. They are still together.
Mark Martin competed in 236 Busch Series races, it is now known as the Nationwide Series.
Once. Mark Martin finished second to Kevin Harvick in the 2007 Daytona 500.
Mark Martin has finished second in points 5 times: '90, '94, '98, '02 and '09.