Trailer Tow Pkg and Cleaner Air Pkg

I'm trying to find out some information on wheat each of these packages included for a 1966 Monaco Wagon.

I know that the Cleaner Air was a CA thing for emissions, and wonder if all the parts on my car are still there (or if there is an advantage to removing anything).

Trailer tow is eluding me a bit.

Is there a resource for the info?

Thanks!