gonna take a peak of this on saturday

If you get the 72' Dart, buy a mig welder, fix the rust yourself, make it reliable and good sounding/looking, and drive it. Make a long-term plan for it, and stick to it. Don't plan anything outrageous, but make a plan nonetheless. I've had my first car for 15 years, I've thought of selling it (recent thread shows that lol) but I don't think I can. Get something you can enjoy and learn from. Try not to spend a ton of cash on it right away, just make it enjoyable and trouble free. Don't worry about a big block or any of that yet. Make sure you like the car first.