One Evinrude CCC & two Johnson RS in the Drammen GP 1980.
All three OMC racing engines was 3 liter V6 loopers, with fuel injection. (Pure racing engines)
Of course the Evinrude was a bit faster and won the UIM OZ class..
#165 Renato Molinari, #11 Bob Spalding & #1 Cees Van Der Velden
Picture by Leif Andersson & thanks to Marcus Weman.
Yes, I was there racing the UIM OE/F3 class