American Offshore originated in Grove Oklahoma. They sold MANY 3100's and a ton of 2600's. Ed Ferro (spelling) was the founder. The 3100 is an old Chris Cat mold. They are definitely fast. I bought my Prochargers for my 28 from Ed when they were still in Grove.
One of my good friends sold boats for Ed for a few years. He knows ALOT about them. His number is: 918-605-2723 and his name is Brad.