[W126 Coupe] Engines

[David Fatovic]

I have a question.  An engine is an engine is an
engine once you strip off the controls right?  So is
it possible to take a 560 engine from a 91 and strip
off the the vacuum controls and the mechanical fuel
injection, basically get down to the bare engine. 
Then build up the 5.6L to have new fuel management,
new air intake etc.  

Also what is the latest MB tranny (year) that you can
mate to the M117 engine?  I would think that the later
trannys would work better, better gearing and 5 total
gears too.

Any ideas?

David