I can’t see Burton moving to the forwards.
Players like Graham could only dream of having the speed, running game and kicking game of Burton. Burton also has a different body composition to Graham.
Tommy Turbo is 4cm taller and 6kg heavier than Burton, but no one is saying he will have to move to the forwards, and fullbacks have to do far more running in a game than 5/8’s. Jack Wighton as another example is the same height and wieight as Buton, and no one is trying to move him to the forwards either.