I have to say for the record I have a '68 Firebird 350 without AC and the PHS docs to back it up that match everything. It has #6 & #8 - 99% sure original items based on the clips, rust and paint (car had never been restored and sat for about 30yrs).
Interesting. I learn something new every day. A couple things I can always be sure of with these cars; there are few absolutes and I'm often wrong.