Displaying posts as a list

In my blog the three most recent posts are displayed with thumbnails and excerpts etc… while any older posts are simply listed with the Post Title, Post Date and Comments.

The result is something like this, with each item having a defined class:

Post Title 12-Sep-2010 Comments (1)
Post Title2 13-Sep-2010 Comments (11)
Post Title3 13-Sep-2010 Comments (7)

My question is what CSS do I need to align the post dates and comments sections together:

i.e. (Without the dashes)

Post Title——-12-Sep-2010——-Comments (1)
Post Title2——13-Sep-2010——-Comments (11)
Post Title3——13-Sep-2010——-Comments (7)

Thanks for your help.