I've read that some people do this for a variety of reasons, improved brake performance and handling improvement. There is some fabrication required for the Disco axels to be mounted to leaf springs. One subject I have not seen discussed is the axel ratio change and if one is using the 2.25L engine do you swap out differential gear ratios back to Series III which I believe is 4.7.1. Now if a larger engine were installed maybe this wouldn't be an issue. Curious as to comments.