What's a good project car?
Of these choices I would go with a Mustang project. They are inexpensive and parts are easy to find.
I would not go with…………………
70-71 plymouth cuda
68-69 charger
70-71 challenger
Unless your college is already payed for and you have a build budget of at least $30,000 + the car cost.
As far the 87 buick grand national…… Lots of nice ones out there for a good price. I wouldn't restore one when you can get a nice driver for less.
Get a Dart, that would be the best choice of all.