The NTC3 is shaft driven, and i have heard of shaft driven cars suffering fron "torque steer". During acceleration the rotation of the shaft pulls the car to one side (or something like that), this would be especially noticeable with the power from such an engine, as the wheels break loose and spin during acceleration, allowing the car to "slide". I honestly dont know how you would solve it, maybe just check the car setup (especially toe), check the steering is centered,etc.
You might be able to get a lightweight driveshaft, which, in theory should prevent or at least reduce torque steer.