I am looking for some help to identify what type of gas tank is in my car. When I bought my 68 Dart GTS 383, it was mini tubbed and the guy told me that he thinks they installed a "B - Body" tank in it. It is definately not from and "A - Body". I need to upgrade to a larger pick up and I am wondering if there is a part number on it somewhere or if there is a specific feature on it to confirm. Thanks in advance for your help, I will post photos if needed. Andrew