PB blaster owns joo!
I'd def recommend you buy some before the install and even soak the bolts down once a night for a week before you want to do the install. Since it is a 2 piece header, it will be simple to put in, you wont have any problems with the radiator being in the way. The only time you might have trouble is the O2 sensor, I believe its like 22mm or 24mm. I worked at a dealership when I installed my old header and used the mechanics tools for the sensor so I dont know how hard it will be with a regular socket wrench.
If everything goes smooth, you could have it done in an hour. If not, then put the stock one back on and take it to the shop. Just my .02
good luck