IIRC, it suffered an early death from an engine fire, similiar to the beloved and heretofore, pretty much unheard of He177.
I had a book full of those odd prototypes. The P-67 Moonbat and the Northrop XP-56 Black Bullet were my favorite two prototypes......err........th e Northrop XP-79 flying wing jet fighter, it was way too cool, too. Then I read the method of attack, and went YIKES!
People either forget or never know that the US had some pretty wicked planes on the drawing boards, they just never needed them, as they were kicking Axis bellybutton with what they had on hand.