New RCD Bilstein Shocks Sooo Squeaky

I believe the RCD have poly bushings, so they don't really squish down like rubber would. I installed flat washers instead of the cup washers on the rear springs because the cup washers didn't look like they would be the right fit for the shape of the new bushings, and it didn't come with anything. I'll pull everything this weekend and clear surfaces and grease the sh*t out of everything. Thanks for the feedback.