Dart Play vs 51 Bear

Last season we came across a team that ran a 5-1 front against us. We are a Gun 4 wide team. We had some trouble running the ball against this team although we threw the ball very well in an easy win. The way we ran the Dart play was to have the pulling tackle & RB read the Nose on the fly and lead up opposite where he goes. This worked well in practice with the pulling tackle on the mike LB but during the game the nose killed our center most of the time driving him back & thus hurting this play. It did work twice in the game but that was as much a credit to our highly skilled RB as much as anything else. Does anyone have any pointers on running this play versus this front?