If you have ever owned an I&amp;amp;T Shop Manual, they make assumptions that the readers are heavy duty mechanics by trade.  I have the manual, read it fifty times.  I am sure this is a no brainer to someone who is in the trade, I am not <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt=":D" title="Very Happy" /><!-- s:D -->