We have a popular blog hosted on the blogger platform with a custom domain name. We want to move it to a self hosted WordPress website with the same domain. The blog has an authority on 8/10 to 9/10 on certain keywords and a global page rank of 300k. I would like to retain the authority and page rank so I don't lose on my readership or ad revenue. While I have transitioned the data to the new website, I am unable to figure out what needs to be done to retain pagerank. Can someone guide me to the steps needed for this? The question is possibly a little subjective and I am not looking for opinion on specifically how to implement but more of a guideline on what steps are necessary.. some tips and tricks.