Several options are open for Indycar to accept some Ferrari participation: - Accept Ferrari as a new engine supplier to join Honda and Chevrolet. In that case, Ferrari must undertake to supply engines at 1/3 of the field. or - Allow different chassis manufacturers than Dallara (Indycar would stop being a specs series) Ferrari could enter a complete car with that option. The first option would be welcome outright, but I think the second one would be resisted by the existing teams. Over to you, Roger !!!