I need measurements on the smoothie bumper please

[Alex41]

As the title states, I'm looking to get both the inner (closest to the fenders) and outer measurements of the smoothie bumper. My plan is to use it on my 84 since they don't have a smooth option for the squares yet. I can fab up brackets no problem and the curvature seems just about right; but I spoke to a guy at key parts today who told me the measurements were 81" inside and 85" outside. That seems WAY too big and I'm hoping he's mistaken. Thanks for the help. Alex.