I would just check on the current ones & swap as required as otherwise it's an expensive job to just swap out en-mass! However given the age of the 500's now I would unfortunately expect most of the original bushes are past their sell by date. I know mine were on my car!
Thankfully you can swap them out in stages. On my car I did the front end first as it was the worst - wishbones & ARB/drop links etc. The back got sorted with a replacement ARB, bushes, & links. Plus I swapped out the toe & caster arms for adjustables. Then finally I went round & replaced the smaller bits & pieces. Results were amazing & the car cornered like it was on rails but it took some time & wasn't cheap!
Plus don't forget the engine mounts & gearbox/rear torque mount as they will likely be worn as well - my engine mounts especially were completely shot!