I would assume that the cowl had to be lifted free to get to the carbs, correct? Why weren't all of these race engines "sealed" during inspection before the race?
We used to apply blobs of women's fingernail paint (hundreds of color choices) to critical interfaces (head bolts, carb nuts, etc) for pre and post race inspection. ;)
Actually, for what OMC had at stake for R&D investment, I'm surprised nobody was given the assignment to sleep / stand guard over these boats?

