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Message: <blockquote data-quote="The Electrician" data-source="post: 1343681" data-attributes="member: 20817">Ford introduced 3 different castings of 4.6 aluminum blocksTasked 1993-1999<img src="http://www.terminator-cobra.com/images/Main%20caps%20Teksid.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" />WAP 2001-2004<img src="http://www.terminator-cobra.com/images/Main%20caps%20WAP.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Aluminator 2005-2009 (some call it WAP NVH)<img src="http://www.terminator-cobra.com/images/Main%20caps%20Aluminator.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /><table style='width: 100%'><tr><td>4.6 Aluminum Block</td><td>Casting</td><td>Weight (lb)</td></tr><tr><td>WAP</td><td>RF-1L2E</td><td>80</td></tr><tr><td>Taskid</td><td>RF-XR3E & RF-F6LE</td><td>85</td></tr><tr><td>Aluminator</td><td>RF-3L2E</td><td>95</td></tr></table>The following photos empasize the difference between Aluminator block on the left (which is the strongest 4.6 aluminum block manufactured By Ford) and WAP block on the right<img src="https://lh4.googleusercontent.com/-G3tsLJAiViw/VMtLRowd1yI/AAAAAAAAIuA/anR5FQEY6b4/w960-h720-no/rmvfyx.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="https://lh4.googleusercontent.com/-IVmabi86VaE/VMtLSih6tzI/AAAAAAAAIuM/9V3KIXzVNWw/w960-h720-no/2aacapz.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="https://lh4.googleusercontent.com/-orPoqwNWBig/VMtLT3n0LuI/AAAAAAAAIuY/s3JZl8V3HiY/w960-h720-no/wvtrua.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Finally, I believe this would be an interesting reading regarding engine blocks and heads castings<a href="http://www.terminator-cobra.com/castings.htm" target="_blank">http://www.terminator-cobra.com/castings.htm</a>Enjoy</blockquote>