The normal size box has the correct ardun heads but has no stock heads. Yellow Truck with five spokes on box art. The flat box with the Blue Truck and the Cream colored panel painted truck as Travis has said have the wrong heads.
Yes Mark you are correct about the new aftermarket heads on the Y Block . Just remember not one of these engines are in stock form, that is not the point of the challenge.
It seemed to me that there was more than the last few years , but I was thinking that I was just trying to rush through them and that was why. Spent too much time and money in the vending area.