I know this is an old post but in my ubs69 in did the method 3 diff drop (although at the time i thought i had invented the idea.) LOL any how i have gone 40mm and slightly rotated the diff up at the back and just givin the cross member a bit of a beating with SLEDGE and made the member bolt holes a little bigger.
I have decreased cv clicking and through the whole Lower A arm range there is no CV fouling....The ubs69 does have a slightly
longer bottom arm than the mu and ubs55s . Same as the top A arm is longer to and the width from rubber bush to rubber bush is longer.where the top arm bolts to chassis...