[swamp]

Thanks for your response. You are right at the cut off point between Glass and Plastic Headlamps on the 1990 ZR1. The Glass Headlamps should have Guide on the front. If they are Plastic you should have either Wagner or Sylvania on the front. If it is also no problem, when you get a chance could you look on the driver's side door jam and get the build date. It will be on the top label, second line and look like 6/90.

Thanks again and I do appreciate your time and effort. Hope it stops snowing soon.

Pat