Looks like a cleanup job. The intake ports could be opend up and squared more, floor looks like it needs work. exhaust has not had the hump in the roof blended, or the bluges on the sides blended. The whole exhaust prt could have been blended better and squared up. Need to take the intake valve out to get a better idea of it. Looks mainly like a intake port and exhaust sand rolled. Though the port entrance to the intake looks decent He put some work into it.