Steve, I don't think the Dawson car was really modified at all after he raced it, unlike the Kennett/Dunlop/Haig car, which kept racing well into the 1980s in OSCA, and kept getting upgraded to stay competitive. The Dawson car was sold to a South Island racer, who possibly did one season in OSCA, then I think it ended up as a drag car. But I don't think the bodywork was hacked about much, if at all.