Working on a 67 barn find. Pretty much complete. Runs when fueled down carb, but can't get fuel from tank TO carb. Fuel line is clear from tank to carb. Tank needs to be cleaned out, but fuel siphon tube is full of rust and sludge. Got the first 11 inches cleared out butno luck on the remaining couple of inches. How many bends and turns are in it? Bottom of tube is hidden behind baffles. Can the whole siphon tube be removed from tank? Only info I can find is a framing on page 5-48 of the F Motor Repair Manual. The drawing looks like the tube is serviceable, but I don't want to force it. TIA!