You can customize the facebook like box by using html code. The simplest way, follow this step.
<div id="facebooklikebox-3" class="widget widget_FacebookLikeBox"><script src="http://connect.facebook.net/en_US/all.js#xfbml=1"></script><fb:like-box href="https://www.facebook.com/607728429342897" width="290" show_faces="true" border_color="AAAAAA" stream="false" header="true" class=" fb_iframe_widget" fb-xfbml-state="rendered" ><span style="vertical-align: bottom; width: 290px; height: 400px;"><iframe name="f25883e0a8" width="290px" height="1000px" frameborder="0" allowtransparency="true" allowfullscreen="true" scrolling="yes" title="fb:like_box Facebook Social Plugin" style="border: none; visibility: visible; height: 400px;" class=""></iframe></span></fb:like-box></div>
Put this code in your html code and replace iframe's url to your facebook page url.
You can get reference here
<fb:like-box>
. Tutorial is out-of-date. – Monocyclic