I want to put a Tickford six from an au into my XW. What mounts should i use. Has anyone done anything like this before. What about space issues?( eg. bonnet hitting) Also what do you recon, Auto or Manual

there might be some engine mount fiddling. it should fit. sounds like a good conversion. i gave a mate a hand once to convert an xy to cable clutch. it's not hard either.

if you are going to rebuild it stick with the Windsor/Clevo V8, you will get a much better resale and no messing around.

i Looked into this a while ago, seemed easy enough.
lots of info on xffalcon.com about putting E/A series motors in XD-XF falcons and their engine bay almost identical to XW/Y.