It was ment to be the closest thing to a V8 supercar for the road. Holden was ment to sell them for around $250,000 each and they had buyers allready lined up for all the cars. They then pulled the plug and refunded all the deposits because they realised that they couldn't build them that cheap as it was costing $500,000 to build each car. Therefore only two remained, the original one Holden showed people to promote the car (the one in my first link I showed) and the other one which is this one at pickles.
My Dads Monaro is heavily modified in every aspect, braking, power, handling etc and the thing is absolutely unreal to drive so I can only imagine what something like the HRT 427 would be.