Ive also got to do mine on my 85 mayfair but obviously the engines still in situe
not looking forward to doing that
I've just replaced the steering rack in my 1980 MIni Clubman Estate and found the job less than straightforward.
I'm unsure as to whether the difficulty I encountered just applies to clubmans or to minis in general.
The inner wings of my clubman has cutouts that accommodate the subframe towers. I followed the advice given in the Haynes Manual, and advice on various forums and removed anything connecting the subframe/engine to the body, but there was no mention of the fact that as the subframe tilts, the top of the subframe tower sections rest against inner wing cutouts and, in my case, did not allow the 3 inch drop widely quoted as that required to remove the rack.
Fortunately, or unfortunately, depending on your point of view, the old tear drop mounts broke and the subframe dropped onto wooden blocks I used to support the subframe.
I would suggest that it would be wise to prepare for a combination of subframe tilt and lowering, preferably under control.
Might be an idea to replace subframe mounts at the same time.
Best of luck.
Hope this helps.