It may look serious, but the only work we did on the street Boss during our track day was change the wheels and tires. Maintenance on the race car was about the same, although in the bump and grind of the race season, there is plenty to do. Paul Brown says the suggested time between overhauls on the Boss 302S engine is an incredible 150 hours(!), the overhaul cost is $4,400(!!), and the engine as a crate motor is $12,000.