75 dart sport as daily driver?

I say go for it. Nothing better for a 16yo kid than the responsibility of caring for and maintaining an older vehicle. I drove muscle cars from the time I turned 16 until I was almost 22 as my primary daily drivers. I am now only 29 and I can say that some of my best memories are in those cars and I probably learned more about cars by driving those than I ever would have in some classroom or by driving some new foreign or domestic car with a warranty.