1973 Dart Sport
OP, welcome to the world of the end is in sight....... It can seem daunting at times depending on what you are working on and what else is going on in your life.... I have done enough of this stuff no to say you ain't alone lol.... It sounds like the hard work is done and the Finish Line is in sight.
I totally understand about chasing parts and then on top of all that you have a long drive just to get your hands dirty on the car. I restored a Chevelle about 10 years ago and it was a battle. 540, nash 5 speed, custom wiring, and a bile of crap to start with. Finally I hit my limit with it and took a week off from work. Locked myself into that garage for a week and by the end of the week it was on the road....
JW