Mechanically, the original 19641/2-1966 Mustang is pretty straightforward. any mechanical parts are shared with the more plebian Falcon.
In addition, there are many parts eing reproduced by companies such as Year One (www.yearone.com
) , and magazines like Hemmings Classic Cars and Mustangs and Fast Fords are chock full of vendors and expertise.
A Chilton's manual should be hepful in trying to resolve repair issues.
Good luck with your project. The fastback, especially one with a V8, is among the most highly coveted Mustangs out there. Take the timeto do itright and you'll have a nifty ponycar you can be proud of.