They probably don't go as high as you want them to, and they'll eat up the knurling on your bar. But they'd look great if you were to put the ez curl bar on them on your front yard, on some cinder blocks. Do you really need stands to load your ez curl bar?
I saw a youtube video of John Phung (I think? or some other inhumanly strong bastard. no matter) using similar jack stands as deadlift mini jacks, with just some velcro tape to protect the bar.