The bottom of the bulkhead has rotted pretty badly in the head About 3 inches up or so. Can I just cut this portion out and fiberglass the remaining bottom of the bulkhead to the floor? It is rotted from water sitting in the floor pan from showers is my guess. It has done it in the other head also. It is a 78 Irwin 37 CC. I see no need in scarfing a new piece in or replacing the hole bulkhead. By bringing the floor-pan up the wall 4 inches or so I will be eliminate the problem for good.