*All* the World Models P-51s come with a fiberglass radiator scoop. They actually cover the scoop with ultracote!
Its also a little different from all other .40-sized P-51 models in that the scoop is not mounted permanently onto the wing or fuse - first you mount the wing, then the scoop attaches to the fuse. Its secured with a pair of dowels and a single screw. Should you damage the scoop it can be replaced without having to cut it off the wing or fuse.
I have the Miss America version, powered with a Saito .91. Because of the powerful engine I pinned the firewall and reinforced the wing joint with fiberglass and epoxy - otherwise its built stock. Its a tad nose heavy, but flies (and lands!) wonderfully.
Its waterproof, too
One of my mates bought himself a WM Dago Red. Its all fiberglass and looks really nice. He's going to put an Irvine .61 into it.