well the 90-93 integra driveshafts that most people including myself use for the crx 4th gen civic swaps arent the most direct fit as far as axle length is concerned especially on the drivers side. The dust shield and the rubber ring are just enough to make them bind sometimes. They stil spin but not freely and there is friction when driving. And even when using the SiR axles the mount kits dont place the motor in the factory position like on newer 5th and 6th gen swaps so the axles still have a tendency to bind sometimes.