I was ALWAYS told, subframes on a 3rd gen are a much needed part. When you put in an engine, or one that creates more power then factory its going to cause the frame to twist, when the power eventually gets to the ground. It stopped EVERY noise that ever came from ratles anywhere in the car.
I think I payed around $140 or less through
www.fbodymotorsports.com and I had my neighboor weld them in. They didnt do as good as a job as I hoped, but I had the main welds grounded down and smoothed out, and some spots were re-welded.