I have a website with over 50k backlinks. I want to update the site, make it joomla 1.5 and change it around. Currently it is on an older version of joomla 1 and does not use any sef components, so all the urls are index.php?option....
Also, when I first built the site, i installed joomla in a directory J, so the sites pagerank 4 is for the domain.com/j not the main site. Any recommendations on this problem would be great as i would like the main site to have the files.
I want to know how to make a new site and retain the content and seo backlinks that I have built.
Make sure you setup a proper server-side redirect for your existing domain/backlinks. You WILL lose some when transferring, it's just the nature of the beast.
However, you can minimize the risk by using proper SEO standards and setting up good server-side redirects, read: 301 permanent redirects. It'll tell Google what it needs and hopefully maintain most of them.
Also, make sure you edit your .htaccess file and force anyone going to "domain.com" to "
www.domain.com
", that way google will never index non-www and screw you over either.