Thanks Kurt, I really respect your opinion. And I completely understand that there is an industry standard. But, I live in an area where there is a GM plant within 90 miles, and a Chrysler plant within 50 miles. And I am an avid Car enthusiast(I attend a lot of car events), I have talked to people who have worked at these plants, and have heard stories of how incorrect parts get into vehicles. I have a friend who installed Glass in the Chrysler plant and he has told me how several different Date Codes would get on one rack. I have personally seen (in the late 70's) a Brand New Chevy truck delivered to the owner with GMC Sierra emblems on the side. And I've heard other stories. Bottom line, considering the condition of both the car and the belts, and the fact that nearly everything else on this car codes out correct, I really believe these belts were original to the car. They are a complete matched set, and I believe that the Date codes would be correct.(approx. 3 to 4 weeks before the car build date) The belt lenghts are even correct, per your report. Do you know what these belts should have been installed in? Was that car line also built at the Van Nuys plant during this time period? With respect!!! Mike