I know guys with 289s that run 12s without NOS. One coupe that ran 12.8s had 3000stall, 4.11 gears, Alum. heads with 2.02 intakes, and a .500" cam. 3000 stall is a huge help to a reving engine, especially when the bottom end lacks torque. Even a 2200 stall would help a lot. Getting the right...