Here's a picture of a flywheel on a 617 that's going into a 404 conversion:

http://www.ki7xh.com/alignment%20tool,%20clutch,%20in%20use.jpg

There's also text of the conversion here with details on exactly what was done. If the engine was pulled from a conversion truck, it may have a different flywheel than the sedan.

http://www.ki7xh.com/dieseliz.htm

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250