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We weren't living in an age of pollitical correctness back then like we are now...

Here are some links about Merc & Nissan engines.

Merc:
http://www.goauto.com.au/mellor/mellor.nsf/story2/DA6D0AF7994F6660CA257ABD007BA513

Nissan:...

Nissan are using a de stroked (down to 5L to keep in line with supercar rules) version of the v8 used in the r35 in GT3 (not Super GT like i said before i edited)

In regards to the Merc, i am not...

Both mercedes and nissan are running their own engines. Its only ford and holden that are using the old ohv motors