I expect you've checked these links already, but there are details of a Swiss driver called Michel Linder on the Racing Sports Cars site:
and the World Sports Racing Prototypes site has a race at Montes Claros in 1967, but there's no-one listed who fits the bill.
Michel Linder did however race at Montes Claros in 1969:
Thank you Tim.
Yes I've checked those sites before. Although I think they are great sites, they are both based in each other, and they have some mistakes too. Some time ago I've alerted for some of those mistakes and the result was a total ignorance from them. So I prefer to ask for other sources.
As an example of what I'm saying, I can say that Michel Linder did not race at Montes Claros in 1969. He made an entry request with a McLaren, then changed it to a Porsche and finnaly didn't apeared at all. In fact only seven cars raced in that race.
I supose that the guy I'm looking for is that Michel Linder (and that "Johnny" and "Linden" were mistakes by the media) but I must have 100% sure. But thank you anyway.
Edited by brickyard, 12 December 2010 - 22:02.