There are so many rigs out there running spacers. On all sorts of different rigs I personally have been running 1.5” spacers on 37s on my Jimmy for many years due to getting some cool wheels. Towed with it, wheeled it, driven it to Moab once. Never have I had an issue. They are cheap aluminum ones. Zero issues I know literally dozens of people that run em. Even guys with duallys towing huge loads to fit wider taller tires.
Run em.
Run em.