Larry Bible likes to smack the ring holding the rod end with a big hammer. This deforms the ring enough to cough out the rod end. An alternative method is to use a clamp type rod end remover like -

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=99849

Either the joint will give as you tighten the remover, or the added tension and a hammer smack will do it. Leave the nut loose on the stud so the whole thing doesn't come flying apart.

Have you checked the idler arm bushings?

Sixto
87 300D