I'm just in the middle of doing mine at the mo.
The way I'm doing mine is to use the existing crossmember and engine mounts and swap the sump, pickup pipe, gearbox, prop etc. You can retain the original front hubs, just remove the outer CV joints from the shafts, remove all the innards of the joint and refit into the hubs to keep the bearings under compression.
Before people start slagging me off saying 'that's the pikey cheapskates way of doing it blah blah blah', I'm doing it that way in case I do at some stage want to put it back to 4x4 therefore meaning less work. I was advised that doing it this way would be perfectly fine by a well respected in the industry tuner.
As for the rear beam and diff, I'll be leaving the stock 4x4 stuff on until the engine has been run in, then I'll fit a pukka beam and diff (not too sure which diff at the mo.
There is a modified gearbox mount cradle that you can get from Ford which another PF member advised me about that allows the 2wd stuff to bolt straight up to the 4x4 shell with no bother. It's not dear either, about £15+VAT so for that price it's not worth pissing about!!
