I have a never-ending pile of cores being moved around the shop from here to there. I use threaded stud casters to roll them out of the way. These have a 3/8-16 stud, but I also have them in M10 to fit LS blocks and can be used in the bell housing side as well. And unlike a little dolly, they don’t slide out or have things fall off.
Big Don Kincaid
Big Don’s Racing Engines
East Tawakoni, TX