One the top of this page, go to the help tab. Scroll down to the vacuum schematics. On the second page is the 64 diagram with the steam boat switch vacuum lines.
Since you have a 64 with air, you should get the 64 comfort control book by Tim Groves. I am an authorized distributor, and there is no markup on the price. The book is hands down, the best book to own, right next to the shop manual. Working on the 64 AC system is guess work without it.
Book is 45.00 and worth every penny.
Agreed on the book. Get it right away.
Does anybody know why Tims website is down and been for a few days?