If it has been done properly it would be engineered and you would have a plaque on the fire wall or in the drivers door B pillar. You would look for tower braces, diff bracing, rated springs and shocks (the only one who rates and stamps them that I know of are Lovells), LPV bracket, offset caster bushes, among other things. You would also have a GVM of 3495 kg on your rego papers.