I'm assuming you have the rocker shafts unbolted to take the load off of the springs? An option would be to bag it w the late Billy Mays's "space bags" www.spacebags.com then you draw all the air out w a vacuuum cleaner nozzle and I'd add some bags of dessicant to absorb the remaining (or most of it) moisture. then it'd be like the inside of the pyramids and wouldn't need to be rotated occaisonally and on that note I'd spray the cyl walls liberally w something thick & then imnho it wouldn't need to be turned over