Looking for a used RS6 engine, can i use S6 engine block?

[tamimii]

dear all
i hope you are doing fine.
my RS6 2004 engine overheated and i have to change the whole engine block ? i did my best to locate a used one for a good reasonable price but with no luck.
i been told that S6 2004 or S8 4.2 2004 engine block can fit? any ideas?
looking for your help and support.
best regards
MT

[bam_bam]

FON.

Rule 1.

It might 'fit' but they are different. BCY/BRV have a slightly different casting, apparently.