Great. Keep us posted on how it goes.
The Dremel Tool and its brethren are important tools that really excel on jobs that are too big to do by hand but too small to do by the more powerful tools like angle grinders and reciprocating saws.
I put in my new cab-to-frame bushings and bolts with my dad and it was a two man job requiring a large box end wrench and a 1/2 inch ratchet. The tack welded bolt was probably done to save labor. I used the kit from Wes at Class Heartbeat.
Here is a diagram of what your new bushings should look like IF that is the route you are going. I went with new rubber as I wanted a softer ride than polyurethane.
If your shims from your truck are too far gone, you can have a machine shop make you up a couple or cut your own. If you have a torch or plasma cutter, it would be a very easy job.