I'm not convinced about poly bushes on those arms. I had one snap on my 90 and one on my 120, both within a month of fitting (Milner) poly bushes. When I recently welded a new chassis mount on my 120 for one of these, one end of the arm had ovalled the hole through the Toyota bush so I swapped it for a poly bush I had lying about. If I look under the car now, with the axle well articulated it's clear the original bush at one end of the arm is allowing a lot of twist relative to the poly bushed end.