[zammer]

Hi those do look like stock style bushings under the spacers, they could be the polyurethane ones instead of stock rubber. I personally would not reuse the bushings as some might have had more load on them than others that squished them down and that may require more shims etc to level properly. It looks like the previous owner did a body lift.
If you were going to go through all the work of getting rid of the spacers new bushings would make sense to do at same time