Roger,
Here are some Austin Healey photos from 1966 at GVR.
Austin Healey # 52, battling with an OSCA sports car # 23
( OSCA sports car
O.S.C.A. (Officine Specializzate Costruzione Automobili—Fratelli Maserati S.p.A.) was an Italian manufacturer of racing and sports cars established 1947 in San Lazzaro di Savena, Bologna, by the Maserati brothers, and closed down in 1967. Its name is usually abbreviated to OSCA or Osca.)
"Wikipedia"
(Jerry Melton photos..)
(Ken H..)