I'm currently in the process of installing a 130A alternator into my W126 with M117.968 (5.6 ECE) engine.
It came from a Saab 9-5, and the overall dimensions are almost the same as the stock 80A unit. It was cheap at £20 ($30US) so I thought i'd have a play.
With a couple small modifications, I have the pulley installed, but just need to shave the mounting bosses back by about 1.5mm and install a 1.5mm spacer at the front of the mounts to keep the pullies aligned.
Will let everyone know if it actually works!

Ben

Just get the correct pulley (I use old GM pulleys) or add a shim behind the pulley then it's a bolt up deal , no need to shave nor modify the mounting bosses whatsoever .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better