yea, a torque wrench is a must if you want to do some major mods to your car. Also, it wouldn't hurt to get a breaker bar as well. It has helped me out in some tough situations because of lack of muscle
don't ever use a torque wrench to break bolts. I have the needle type torque wrench. It's cheap compared to the other types of torque wrenches, but it's a CRAFTSMAN!!