The person who had the car before me was a little strange but he did give me some info about the car's engine. He told me to adjust the valves at 18 on the intake and 20 on the exhaust. It hasn't been adjusted since we first did it after the rebuild initial set up so maybe it's a good idea to go back and re adjust the valves even though there hasn't been more than roughly 150 miles put on the car.