Kamran
Is the engine a bespoke unit? Or is it a development of an existing enigne? Looking at the bore, I think it might be two SR20 or FJ20 blocks destroked and lobbed together at the middle. Then again, it could be a Nissan Patrol V8 unit.
Other than that, the $1,000,000 price tag seems fairly "normal" because all of the GT1 cars homologated for the road had the same price. The Porsche GT1, the CLK-GTR, the 333SP and the Riley & Scott WSC. Although in the case of the Riley & Scott and the Ferrari, I don't know who'd be nuts enough to run it on public roads.