Auto body repair & detailing: front frame rails, mustang coupe, frame rails

Question
I have a 1967 mustang coupe. The front frame rails from the fire wall forward need replaced. I would like to know if this is something I should attempt myself and if so how hard would it be? If I decide to do it myself how would I go about it?

Answer
Do you have any idea how delicate this kind of work is, if you do not weld, know how to measure frames or know how to tweak certain ares in the frame, you are looking to create a big mess. Hire a pro. You will probably leave me a bad feedback for this response, I don't care, I get too many very stupid questions to answer and this I do for free, some people have valid problems that do not waste my time, when you have one of them, I'll do my best to help you, if I have not quit this nonsense by then.