Bought Pagerank 3 domain

Hi fellow blackhatters

I've just bought a domain with links from goverment websites. Still live.

I dont know how I'm gonna catch them all.

How do I keep my pagerank?

Right now I just posted a quick introduction article on 500+ words. 100% unique. Also downloaded 2 files from a study website, with texts on more than 1000 words,
so I'm curious how I'm gonna do this. Could anyone please link me to a thread about doing this best?

Right now I just got a related article to my affiliate site and linked to it.

Thanks for your help!