Suspension fabrication...
#4
Strut tower bars are pretty easy to make, so are rear control arms and panhard rod. You can basically use your suspension stuff as a template, but the stb you will probably have to make your own templates.
#5
STB is a piece of cake. Just make your plates to fit each tower, bolt them on, and basically just tack it already bolted to the car. Then you can pull it off and finish. Thats about as gravy as it gets.