I am not knowledgeable regarding seacraft history. All I can relay is that I just recently picked up a 1985 23 Sceptre which is a SeaCraft Industries made hull. It has a factory black windshield, factory 30" notched transom with the fold up/down splash well gate. Also has storage boxes under the seats instead of being completely open floor with seats on pedestals. As of right now I can't read the label on the old tank. Maybe once I get it out. But my guess based on how long it is is going to be 120-ish gallons.