If you race in NHRA Division One ( Northeast) one thing you can count on is the class ET breaks changing every couple of years. They ruined Pro/ Heavy when they went to a 9.00 low ET. IMO it should have stayed at 10.00. After years of racing in Pro/ Heavy two years ago I slowed my car down , put DOT tires on it and started racing in Street Eliminator ( 11.50-19.99) My car runs consistent 11.50s and I`m having a blast! Theres only a few 11.50 cars every week so I don`t have many headsup races but there are a few real slow cars( an 18 second Station Wagon, a 16 second Maverick, a 16 second Jeep etc.) I have to wait a long time but once I`m in third gear its fun running them down. When I race my truck I`m being chased most of the time, If you are decent on the tree, have a consistent vehicle and can judge the stripe you can do fairly well.