What to know before adding AC

I put that exact system in my 69 Barracuda. It works great, it is very high quality, and the kit was very complete. The only problem I had is that the instructions were not very good. They may have updated them, but there were multiple errors in them when I bought the kit about 8 years ago. I eventually had to call the Tech line 4 or 5 times, and I am a very competent mechanic. Each time they were very helpful, but if the instructions had been better, I would not have had to call. Here are a few of the problems I came across:
1. A page or two that showed the picture and name of each part would help. Otherwise when they say to install XYZ part, sometimes you wonder what they mean.
2. They frequently call the same part different names on different pages.
3. Their explanation of which hose went where was pretty poor. I had to look at the pictures.
4. In one place it said, "the following steps are for 67 and older cars, but it never said when that section ended.
5. You were told to plug 2 different connectors into two different micro-switches. They named the switches, but since they were never identified, there was no way to tell which was which. The connectors could have plugged into either switch.
6. The wiring diagram was pretty much unusable.
7. The section that covered the extra pulley installation had several mistakes in it.
8. One of the pictures in the instructions was so fuzzy, it should NEVER have made it past a proof reader.
I typed up a very nice and polite 6 (or so) page letter with all the errors in the instructions and mailed it to them. I told them the kit was great, but there were a lot of errors in the instructions, I kind of expected a thank you of some kind, but never received one.
Again, don't get me wrong, It is a great kit. Read the directions thoroughly several times before install. I think I still have a copy of the letter I sent to them. I'll send it to you if you are interested.