yes it is free air the heads have been shaved . the clutch has been beefed up. cleated track with carbide picks. fast in its day. would beat most 440s. I live about 20 miles east of Balzac.Thats a free air isn't it? Cleated track? I might be interested, I had a 1980 TX-C when I was younger and am kind of looking for something to do vintage drag racing with and those 340's were quick for there size. How far are you from Calgary?