That's great and great info about the Chrysler 383 pistons!  You'll have to let me know how that &quot;header&quot; turns out!!  I'm assuming you'll need to retire the engine skirts for that to happen.  I'm trying to keep something of a stock look but...never thought about trickin' out the manifold.   <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt=":D" title="Very Happy" /><!-- s:D -->