Do 400's run good ?? Well my son has run 11.40' @ 117 with his stock stroke 400. It's a mild build with stock Eddy RPM heads and the MP .557 cam. He runs 3.91's gears and drives it to the track just like me. His Dart weighs almost 3600 lb's with him in the car and he shifts it about 6700 RPM as he runs 26" tall tire's with the 3.91's. Ron