Back light is not hard at all in our cars, just patience and the right tools.
It is basically a flat window.Don't wanna damage the original. Worth a $ or two these days.
Lets chat at the end of this week, maybe Friday when the Arts loosen up on my end. I'd like to pay a visit to your garage and talk with the suspect face to face. Suspect being a certain 63' Plymouth that has been bullying all of Long Island. LOL.