Re the Group A Falcon, the V8 had been dropped from the range at the end of 1982, and the XE model replaced by the XF in early 1984. There are a few XE Falcons floating around with the 4.1 turbo -
link
Al, if the Camaro was going to be raced in 1988, it would have had to run 1500kg at 5.7L compared with 1340kg at 5.0L, not an inconsiderable difference.
The VN Group A in 1991 was a victim of the recession - they were priced at $70k or over double the base Commodore SS V8. Sales of all expensive cars hit a brick wall at this time, let alone a hotrod extravagance like the Commodore.
Finally Jesper here is a Datsun 240K coupe / GC110 - this is the 1970's Skyline coupe, which saw the first version of the GT-R
http://upload.wikimedia.org/wikipedi..._GTX-E_001.jpg