There was a multiple frame photo of the rollover in a magazine ( Autonews?) at the time, was actually about 3 total rolls IIRC, one shot showed the 'Cobra T' sump, think the trans was a T10, not sure about diff. There was a rumour floating around about how the Cortina body shell was 'acquired' at the time, but only a rumour as far as I know, car was quick, gave the John Armstong ( ex Fahey) Shelby Mustang a run for its money at the previous round at Teretonga.
There was a second V8 Mk1 Cortina( Chev) in the Osca series at the time, a car built by Peter Kocis & then raced by Andy Threckhold. incidently this car rolled at the Teretonga round, but repaired in time for Timaru a few weeks later