I am a Mustang owner also. By far the best Mustang site is the one started by Bob Dooley a long time ago. The site has about 5500 members and is extremely active. The forums can be found from Bob's webpage at www.vintage-mustang.com

They are a great community over there and have great people.

I was elated when I found firstgenfirebird.com because I was used to such a good group of people over there.