My engine builder didnt have the hoses or anyway too hook them to radiator when he was priming the engine in his shop. When i installled the engine i never hooked them back up as there could be crap in the radiator, as long as you know your radiator has no debris in it just hook them back up if you like. I didnt plug the holes in my radiator either. I run a billit cleanable oil filter i got from Nick in arizona and that is it.