Use axle grease and then bag it in a couple of HD garbage bags. The 454 I used for mock up in Bad Ast has been on the unheated side of my shop for 15 years. When I got it I smeared axle grease in all of the cylinders and all of the machined surfaces. Axle grease will not run off like motor oil or burn off like WD40. It looked just like the day I bagged it when I rolled it out a few weeks ago.
Mark