[fordteacherguy]

Shipping weight can be adjusted by NHRA at a whim. A few years ago they changed the shipping weight of 89 Mustang coupe to a lighter shipping weight to make that body group for 1987-1993 unable to change 4 classes as the weights between those various years and models were originally listed from the factory. Some years were light and most of the 89's were heavy depending on transmission and model. A couple of us got bounced out of N/SA when they made up a new weight for the 89 coupe.