The idea of a car bearing the word 'McLaren' on orange-liveried flanks racing in this year's Indianapolis 500 would have sounded preposterous a little more than a month ago. The prospect of the same Formula 1 team competing at the Brickyard 30 years ago would have seemed just as ridiculous.
Yet there was a plan for McLaren to race Indycars full-time in the mid-1980s in a different hue of orange - the familiar lurid orange-and-white of Marlboro.
The plan belonged to Marlboro parent Philip Morris rather than McLaren. Its representatives in both the US and Europe spent considerable time and effort through 1985 trying to persuade a team that had dominated F1 with Niki Lauda and Alain Prost in '84 to double up on its racing programme and enter the CART Indycar series in '86.