how about some hard numbers?
http://www.natsoft.com.au/cgi-bin/results.cgi?28/09/2003.ARDC.R3Pos Car Entrant Driver Vehicle Cap CL Laps Race.Time Fastest...Lap
1 5 AUTOHAUS HAMILTON Bill Pye (NSW) Porsche 996 GT3 3600 A 5 8:24.1670 4 1:38.5196R
2 18 TATTERSALL'S William Adams (NSW) Robnell Cobra 302SC 5100 A 5 8:26.9265 4 1:39.2996r
3 43 CELERITY RACING Stephen Borness (NSW) Porsche 911 GT3 3598 A 5 8:27.6662 4 1:38.6101r
15 71 BRUGGONE MOTORSPORT Chris Van Bruggle (NSW) Lotus Exige 1800 B 5 9:24.1032 5 1:48.5260
looks like the mustang cobra 302SC finished second with a fastest lap of 1:38, the exige finished 15th , fastest lap of 1:48