18 Feb 10
05 Mar 10 1:23 am
It's possible you will lose ranking. Your ranking is determined by lots of things we don't know about and by some things we do. One is the text on the page, the title, headings and general weight of keywords on the page. The there are the backlinks other people (and you) and created to individual pages on your site, and the link text they (and you) have used.
So unless you can re-create what the old site did without Google noticing it'll change the rankl. almost certainly. Of course it may improve.