My point was that pre-video changes that aren't officially catalogued have to go by memory, and in almost every instance where someone has sworn that they remember something being different 30 years ago as a kid, there has never been any evidence come out that such is the case.

There's a bootleg from 1977 you could check out though. It was filmed from a projection room IIRC. The detail is pretty crappy because of its age, but you might be able to confirm the existance or non-existance of this detail that way.