02. The answer is as simple and straightforward as Forrest Gump. Just get a box of chocolate. When you are done eating, grind the backside welds down on a 45-degree angle, and separate the tank halves just like the factory had them made. You will notice both halves were made on tooling and there is a lip pressed on the inside tank portion for shape and weld penetration on the inside pattern. It’s a good idea to tighten and leave the through tank petcock before you pull your old tank apart. If you pull the petcock your work can take the alignment out and your petcock will no longer seal, resulting in leaks.