It’s not that hard. Well, it’s awkward…
It physically fits between all the junk and the dash lower lip, but you have to be careful to disconnect everything, and to be sure not to scratch the front of the bezel on the back of the dash as your lowering it.
The hardest part is getting under there and visually confirming that you’re disconnecting everything.
And in reality, you only really have to disconnect the speedometer cable to start the process. Then you can get it low enough to disconnect the wires.
Some of the wires are long enough to let the whole unit hang down below the dash. You just have to make sure that if any are too short, you disconnect them.
I suppose, putting a little tape on the back of the dash, or better yet, on the front edge of the bezel, before you lower it out of position, would protect the delicate paint.
It’s been awhile since I’ve done it, so can’t remember every detail. But I’ve never had to remove the dash.