Unfortunately, Ford throws a wrench in the works by welding on the ring gear of all M190 axles. So, even if you buy a Torsen, you'll still need to swap out the ring and pinion gears. Probably still cheaper than swapping in a 210, and all that entails, but not as clean as it could be...I would rather have a Torsen that bolted in the M190, it would solve the vast majority of what I would want/need without having to go to the M210. If you need the M210, then you should definitely consider the Sasquatch or the Badlands. As others have said, it's a great bang for the buck.