Wow, I feel terrible for you, Russ. That just plain sucks! First, I'm glad you weren't hurt! You must have had your seatbelts on. I've had my car for 34 years, so I know what you must be feeling, as far as losing an old friend.
I'm glad you got a new project to put the engine in, but I also hope you don't give up on the Mustang. Or at the very least, see that it goes to someone willing to put the time and effort into getting her up and rolling again. Not an easy task, but it's doable.