Terry,
At this site you can see that the car is much as it is today.
http://autopics.com.au/75412-s-koste...-peter-d-abbs/
It became a Matich SR3A about 1972 (Is the A mean altered ? )
Not sure who did the alterations and if Frank Matich was involved or consulted etc.
The "terrywalkersplace.com" site on Stuart Kostera has good information.
Perhaps because it was in the 1968-1974 Can Am class at Laguna Seca and it was altered / transformed in 1972 it was able to enter the Historic race.
They are particular there and even had Roger Williams repaint his McLaren M8E to the colours as it raced in the seventies.
BTW. The photo I used as an early example was from youtube.com.
I hope I did not make this too confusing.
Cheers,
Ken H