Hello a ll

Im just wondering is it possible to get 500 + bhp from the escort rs turbo without nitrous.
Now i relise a new engine would be needed as the standar 1.6 might not be able to handle it.
So what engine would you think would make that sort of power. ? 2.0L ZVH ? any thing else ?
Also im looking to make it 4 wheel drive aswell .
What would think?