My wife and I recently acquired a 87 Camino in near survivor condition, 56K miles and a 7 year old "Terminator" paint job. I have been fixing a few minor maintenance items as the complete drive train and under-hood is as built 36 years ago. I am trying to figure out the left side wiper blade assembly. Right side assembly has a rectangular base on the blade arm and the transmission arm. The left side has a "fan" shaped base on the blade arm and the transmission is rectangular in shape. The lock on the blade arm does not lock underneath the transmission arm. According to GM website the wiper arms are correct, I am thinking maybe the transmission arm is not correct. Am I missing something simple or do I have a miss matched set of parts.