Getting started to work on my 1974 Dart Sport. I got questions

Exactly what dano said. It's really easy to go down the rabbit hole with a project like this.
A whole lot more information about what you want to do with it and how original it currently is, and do you want to keep that originality if it still exists, or do you plan a no expense spared full on pro touring ride?
It's very easy for us to spend your money, but at the end of the day it's your money, your car, and your vision that are most important. Tell us more.