That is not a cultipacker. I agree that it is a cultimucher, and it is going to take some HP to pull that thing. If you lower the tines all the way, you might not be able to pull it with 60 hp.
hotchkiss is right 60 hp at the very least. when I was in high school we had an IH model was probably heavier than what your looking at didn,t want nothing less than 80hp to pull it with. sometimes wished we had more.