For your search, the 04 -08 FI Wide Glides use the same tank as the 07-10 Super Glide Customs. They will bolt up to your FXD fine. You will need new console, speedo and brackets, and hardware. You will also need a new bar clamp. The swap is fairly straightforward. You will probably have some wiring extensions needed in the project. I have access to some pretty good info on swapping the tank guts. When the time comes, let me know if you want it. A service and parts manual would be a great asset while doing this.