Sounds like you have a pretty cool mom The '68 was my first car and I got it right after graduating from high school. The motor is an original 302 4bbl with a C-4 automatic. The motor was rebuilt in '91 and isn't a power house...maybe 270 HP. I'm tempted to stuff a big block 428 in there with a 5sp manual, but we'll see...I have the Cobra around if I want to go fast.
I agree, these fastbacks are selling for crazy prices. Just look on e-bay. Fastback mustangs I used to see in junk yards are now fetching bids in the $3,000 to $4,000 range....insane.
I wish your mom the best of luck and I hope she is able to get another one. I hate seeing muscle car prices getting out of reach so only rich investors can get their hands on them rather than the average enthusiast.
I only have actual photos on hand, but I do need to get some digital pics of the '68 soon. I'll post some here for you if I get the chance.