sycamore, my apologies if I led you astray by saying:-
but not a twin jet
As you rightly say it did have two gas turbines coupled to a common gearbox.
The engine was the Allison XT40-A-2, rated at 5100 eshp and 830 lb of residual thrust. The engine had two Model 501 (XT-38-A) gas turbines mounted side-by-side and connected to a common reduction gearbox. The gearbox drove a set of co-axial propeller shafts that turned a pair of three-bladed -14-foot diameter contrarotating propellers. The two power sections could drive both propellers independently when the other section was declutched. In cruise, one of the T38s could be shut down to increase range and endurance. The engine was mounted in mid-fuselage below the pilot, and was fed by a pair of intakes, one on each side of the lower part of the nose between the wing leading edge and the contrarotating propellers. There were large exhausts on the lower rear fuselage, one on each side, just behind the wing trailing edge.