So I just did this job in my driveway. Here are my thoughts. Ramps did not work for me because I had to rotate the drive shaft to remove all the bolts on the rear flex disk. They are hard to get to. Driveshaft wont rotate if the car is on ramps. It's a good idea to mark where everything was originally lined up although I can confirm the "-" and "=" marks were there to make sure the shafts are balanced. I did not have to remove the exhaust, just the exhaust shield nearest the bearing so you can see the alignment mark. Actually just unbolt it and slide it towards the front of the car enough so you can see the mark "-" on the front shaft. It is just past where the rubber boot connects. It requires a bearing puller to remove the the old bearing. Luckily I had one. What I did not have was a a tool to press the new bearing onto the driveshaft so off I went to the hardware store to buy a 1 1/4 inch round piece of steel pipe 8 inches long to hammer the bearing with. It was threaded on both ends but it worked. $12. So yes the bearing must be installed onto the driveshaft before you can reinstall. This was harder than expected and basically impossible without special tools. I supposed having a service manual would have saved me from the surprises.