Looks like a nice find! Too bad he will probably not sell any of them, at least not at current marked value. But it wouldn't hurt to keep in touch and continue trying. Sometimes collectors like this appreciate the attention. Sometimes they don't, but then they usually don't show them off.
The story is nice, but does sound a bit embellished. Those are 80's style steel wheels, how did they get on there if they where all bough in 1970-73?
As far as one car having every option available, that is just not possible. There are to many overlapping options and multiple option choice's for this to happen. But that was a common way to describe high option cars back in the day, before we actually White Books and RPO lists.
And the black one isn't an SS.