Need a Measurement - 68 Dart

Does anyone have the official measurement from the center of the front wheel spindle to the front of the rocker panel? For a 68 Dart.

I tore out all of the old stuff and got rid of it. Now I don't have a baseline.
I'm going to get a complete chassis and set the car on top of it.

From what I can tell the measurement is pretty close to 19". Would someone mind throwing a tape on the front of the rocker panel in the fenderwell (where the bolt holds the splash shield) and give me a rough measurement?

Or, if you know of a different way I'm all ears.

Thanks.