Wiper Motor Linkage Bushings (Nylon)

They make different sizes ? I didn't know that I got my bushings from a dealer and they pop on and stay on for a little while then the arm pops off the pivots ! ( this is the arm that goes over to the passenger side ) have to check size ! This is on a 73 swinger


Not sure if there are different sizes or not, but dad n I had problems with his bushings for 67 cuda. On his there was a wavy/spring washer missing...got it installed and had to tweak it a bit, but works good now.