Top 5 worst A-body repairs/restoration jobs

I have a 1973 Dart I stripped to a shell, painted. 360, 4 speed with a for 8.8 rear end, 21 circuit gm universal painless wiring harness, vintage heat/defrost.
The stuff I found difficult or spent the most time researching were;
1.) Headers (I absolutely hated installing headers)
2.) Finding replacement ignition and turn signal connectors also figuring out a neutral safety switch, I saw brewers carried a $200 option I didn't want to do
3.) Starter is in a horrible place when I have line lock, mechanical clutch linkage, torsion bar, power steering all in one place. Really hoping things don't go wrong there
4.) Tire fitment has been tricky to run big tires that are square front to back
5.) Finding a rear axle narrow enough that will handle horsepower at a reasonable price

I think why I have such a hate for the headers is it was the most expensive item I had on the car for a while and scratched them pretty good trying to install