In the article, it claimed Mercury was not far behind OMC with a rotary. Was this true in any capacity?

Also, there are definite parallels between the OPC and the rotary and the turbine cars of Indy ( 1967,68) as to how things were handled. Just as the racing commission ruled the 3 turbine cars that ran in 1968 had to run smaller air intakes to slow them down, the next play in the book if they had hit production would probably have been to restrict them in some way.

This is great stuff!