On my 1976 308, noticed the small fuel line leading from the fuel tank to the fuel filter and to the fuel pump are cracked and yukky looking. They even leak gas when flexxed. I'm guessing that Gates 1/4" or 5/16" fuel line will work but what can I expect when I take the lines off? Will the gas tank empty? Any tricks to doing this? Also, what about replacing the fuel filter. If I remove it, will the tank empty or what? The user manual doesnt have a part # for it. Calls it FISPA ???