So presumably the owner of Small's confectionery visited Shelby in person in California, talked him into selling the fastback, & exported it to Australia.So would the car have had to be converted to RHD once here? (Mid 60's).
It may have been Poppy Red, a Mustang colour that looked orangey in pics. The "8 throats in the carby" probably describes twin 4 barrel carbies, which were a common enough on race cars.Shame your mate doesn't have a rego number. Peak motoring organisations have archived VIN/engine number records to trace older cars.
Maybe the Customs Dept releases their records for access after 30 years. Can't be too many Shelby Mustangs imported say mid to late 60's.
Flick an email to the curator of the York Motor Museum in York WA. Not much of interest in WA hasn't passed through the hands of owner Peter B, such as a 427S/C Cobra, 300S Maserati, D Type Jag etc, all since sold. He's kept his WO Bentleys tho. Sure it's a long shot after 40 years, but few other options in the locker.