Many conversions have been done all over the world, but what you can or cannot do depends on your abilities, your budget, your end goal etc etc etc etc


LS400 type V8 is a very good option, comes with an auto trans etc. But many have fitted manual boxes too.
Again depends on needs, budget etc etc

Collins in the US make various adaptor kits for manuals

http://collinsadapters.com/index.php...ased-kits.html