I use an engine crane and correctly rated lifting straps when I need to move a machine. I have four strap ends, to fit over the hook, I can get them all on, with the safety spring clip closed, but is a bit of a struggle and the same with getting..... the sodding things, out of the hook. Is there some type of accessory I could use with the hook or an altenative fitting altogether, to fit into the cranes lifting beam, which would make life...... a lot easier, ideally the cheapest option to do the job. Sorry about the photo in original location is portrait, tried to change no luck.
Another way of going at this, might be to get a set of straps with a lower loading spec adequate for what I want, swings and roundabouts, perhaps cheaper option than a great big shackle. Those purple straps I think are a 1 ton rating.