On this site
The La Carrera Panamericana...: Women of La Carerra Panamericana
there's most of the story, how she is British, married a Mexican, kept racing her Porsche until she entered Carrera. She was really tough, up against all the men. It doesn't say if the factory gave her any support or explain why she had Eva Peron's face painted on the car. I wonder if the car has been found in recent years and what SN it was and if it was a Carrera.