As Neil says, Headers are a pain even with the engine out they are a pain Day's work on car with lots of shouting swearing and grazed knuckles!
Rest of Zorst could be done in a couple of hours - depends on fit and how careful you are taking the old one off.
Coliovers I'd allow a day can be done in about 2 hours if all the bolts are easy and you have done them before.
droplinks easy after you cut the old ones off
Plenum spacer 30 minutes allow an hour in its yoiur first time
Camber kit - which one? The rear camber arms are just 4 bolts so an hour.
Good luck, take some pics and get it in your build thread