I was reading an excellent blog posting on the supposed McLaren M23 owned by Antonio Carlos Avallone. In fact, the M23 was not an M23, but rather the only McLaren M25 ever built, designed by McLaren in 1973 specifically to house a Chevrolet engine, to be used in Formula 5000. It was tested by Howden Ganley, and purchased by Avallone at the beginning of 1974. The M25 was based and very similar to the M23, and it was also similar to the wedge shaped McLaren Formula Indy of the day. The story is real, and there is a twist. There were legal proceedings in England against Avallone, filed by David Hepworth, not by BRM or Louis Stanley as reported elsewhere, concerning a BRM P154 that had burned in a fire in a ship on the way to the Avallone promoted Copa Brasil series 1972. For a long time a fancy story circulated, saying the ship was full of European cars that were going to take part in the Copa Brasil, seemingly an excuse for a weak grid that was fielded at the end of the day. ...