The model 5 Outback, smooth cowl, with the 912 dynafocal egine mount, the oil tank is slightly left of middle and at rear of the engine.
I believe the model 6 is the same.
I think somewhere in the 7 series and newer, the fixed boot cowl and the Rotax 912 engine ring mount came to be used, which got the carb manifolds back to stock orientation, put the oil tank on the side, coolant and oil radiator together slung underneath, plus gave a little more room to work on things, I think it moved the prop flange around 4" out from the firewall.