Alex3, If the pine gets lots of water and the injured area is trimmed smooth, it will grow in from the sides at about an inch a year. This is two inches of coverage a year, so I don't think it will rot out in the 4 or 5 years it will take to heal. Pines make a lot of gum and that helps seal things up before the new bark and wood comes. Hurricane Juan did a number on several trees here, and other than trimming jagged areas smooth, I didn't have to do anything to get them to heal over. I would leave the competing leaders till the biggest gets some size on it, then remove just one every year or two...till you end up with just one left. Any green area is making food for the tree, and it will need all it can get to grow and seal up the broken off area. The only trouble with the bridge grafts, is that the grafted areas will continue to grow, making an odd shaped multipart trunk, which may split later in another storm.