Hooker Andrew McCullough looks set to bolster Brisbane in their NRL grand final re-match with North Queensland in Townsville after training strongly on Tuesday.

McCullough appears primed for a stunning return from a hamstring injury on Friday night in what looms as a full strength Broncos line-up three weeks earlier than expected.

Forwards Adam Blair (suspension) and Alex Glenn (calf) also look set to return for ladder leaders Brisbane.