Mustang Decoder Online
Using your car's doorplate and VIN (Vehicle Identification Number) you can decode how your car looked and what features it had when it rolled off the assembly line. This is especially useful when you are trying to determine if a feature is original or after market. It works with all 1964 1/2 through 1973 Mustangs.
CJ Pony Parts
CJ Pony parts has been my source for nearly all my parts since I started working on Hugh. They have reasonable prices, crazy-fast shipping, and a great selection of reproduction parts.
Mustang Monthly Magazine
One of the first things I did after getting Hugh was beg for a subscription to Mustang Monthly for Christmas. It's an awesome magazine.
The Ford Social site is Ford's social networking site for all Ford enthusiasts, but of course, it's heavily Mustang centered, because how could it not be? Lots of cool apps, badges, pics and stories here.
Mustang Club of America
All the cool kids are in this club. Shouldn't you be?