All the references to Hopkins and Toney... Toney did well to even make it to the ring that night. And Hopkins was an aggressive offensive fighter back then, not the masterful ring general who had perfected the sneak lead rights and crafty counter punches.
I think McCallum would focus on overhand rights to prevent Jones' outside hooks, and look to parry lead rights and follow with long rights of his own followed by left hooks or counter body shots. McCallum UD.