I was able to get the spacers out in about 20-30min using the jack that came with the car (most of the time spent using the crappy jack).
Called the dealership to cancel my apt and he mentioned that the "master tech" didn't actually work at their dealership, and that he had said they were only on the front. Presumably just to lift the nose so it could get on and off the truck without scraping.
Pics of the spacers and back springs to confirm there's no spacers there (shouldn't be).
https://www.dropbox.com/s/s8pdost4g6...mo-spacers.jpg
https://www.dropbox.com/s/fpj8rp7p8r...back-right.jpg
https://www.dropbox.com/s/ncol3enwp8...-back-left.jpg