Help Poly LCA bushing install.

The flare on the end of the inner bushing shell is definitely going to cause problems for you. The problem is that if you cut it back you'll probably cause the shell to move on the pin, it's not a hard press that keeps the shell on the pin and it doesn't take much to disrupt it. You definitely don't want the shell rotating on the pin. I would buy a set of pins intended for the poly bushings. Otherwise you'll need to press a new inner shell onto that pin.