trim packages for 72 blazers?

[Firebirdjones]

http://1972c5.com/blazer_pages/blzrbrochure.html

Here's one example.

Unfortunately that doesn't seem to be everything. I've seen the option packages broken down like I mentioned,,,A/C, and then A/C with tilt wheel etc....it was some sort of convenience package that came in 3 or 4 levels of comfort. I don't see that listed in that particular example.