I believe the bluebird holds the lap record for the old track. In I think 1984 when they were on pole they pulled out a full boost lap and set the lap record and the following year they put the kink in conrod. I don't know the finer details of the story but it's something like that.

The bluebirds were hampered by homologation rules because they were restricted to the type/size of turbo they were allowed to use and suffered reliablility issues with them. The DR30 was another story and was quick and reliable.

Don't know if anybody has been to the trackside "la porceta" up at gosford but the owner has one of the ex-gibson bluebirds, a DR30 and I think several of the gibson GTR's. They have them on display at times, in the restaurant. it's worth a look.