 Sydney based racer/designer Frank Matich was scheduled to co-drive with Firth but had to withdraw due to other commitments.Firth wouldn't have minded so much on missing out on the driving talents of Frank Matich as he was always of the belief that drivers used to being able to drive their specially built race cars hard weren't well suited to Series Production racing where you had to be much easier on what was really a road going car.Matich then recommended Gibson (who had finished 2nd in the 1966 race in a Cooper S) for the drive, with Firth meeting Gibson for the first time at a Bathurst hotel on the Friday before the race.