From what I know so far, I agree with that. Maybe if one found a well preserved 350 but with a bad engine going for a low price, would be an interesting project. Or if a 300 603 motor went badly south and no good candidate was found and the car was worth the effort. A number of 'ifs' in this paragraph.

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Te futueo et caballum tuum

1986 300SDL, 362K
1984 300D, 138K