Hello from SW WI, my name is Galen Govier and I just signed up to this site.
Just guessing but from what I read of how Daytonas were built, they pulled the seats from the cars and set them as side in a pile. Some cars got finished as Daytonas and they just grabbed seats that matched the build code, nobody looked nor cared about build sheets. Years later, restorers started noticing that few, if any, cars had their original build sheets with them.
GG must have had a build sheet for someone’s car and tried to squeeze all the money.
Just a guess.