So I found a video on youtube where in the audience reaction video from 1980. Vader literally says “No Luke, I Am Your Father.” Thoughts??? There’s obvious editing but could it be there were audio versions of that in theaters. Could it be this is how the common “Luke I Am You Father”, comes from??? https://www.youtube.com/watch?v=eZCo_hZLyh0
Someone in the comments explained it. It was recorded by someone who worked at a local news station in Phoenix, Arizona. The different line is just a glitch, not an audio change.