This is for a nice looking used McCoy 40 gas or nitro engine. This might be a RED-HEAD as the cylinder head has a reddish tint.  This comes with a 10/6 TOP FLITE prop and a nice big nose-cone.  There is a Testors sticker on the back side. I see no damage, it does have a tiny mark on the rear exhaust port. I never ran this and it is being sold as-is.