Barry, This is very interesting. I had a similar finding in a 70 Charger I once owned. I found a broadcast sheet for my car + another that was +2000 on the VIN#. I could not understand how the other sheet could have ended up in my car. I looked at the sheet info today after reading your post. The SPD's of these 2 cars were 4 days apart, the VIN #'s approximately 2000 apart but the sequence numbers are only 36 apart. This may mean that these two cars were built much closer together than the SPD date would indicate. Possibly explaining why the sheet ended up in the car.