The pistons definately look a lot worse and looks like one of the pistons and rods has been changed as casting marks on the rods are slightly different and piston is in good nick with no damage, but iirc that was cylinder 3?
Will chuck some pics of the pistons up shortly athough the markings/numbers have rubbed off so can't define which was no 1
Will chuck some pics of the pistons up shortly athough the markings/numbers have rubbed off so can't define which was no 1