I got an electric grinder from Harbor Freight. It was cheap (50 bucks I think) and it works well. I got a carbide cutter from the hardware store, and I still use the same one, after doing the exhaust manifold to turbo, and the bumper shock for intercooler clearance, the intercooler lines, and I am sure a couple other things.
Just watch it around a loose shirt, it will tangle you up in a hurry, and to rip your shirt. Eye protection is a must as well.