iirc we had a play wiith one of these to fit to a 4x4 and it fouled the oil filter so we rotated the solenoid clockwise to miss but then the solenoid covered the centre mounting hole so we passed a 8mm bolt through from the gearbox end and fitted a nylock nut and washer . does seem to turn engine over with more torque but a little slower.
we now have one fitted to a 4x4 with a wrc winged sump and breather system with no problems
David