tkplay
have you ever been to the 500Ecstasy website?
it seems rough idle is somewhat common, sadly.
http://www.500ecstasy.com/forums/forumdisplay.php?s=&f=6&page=1&pp=25&sort=lastpost&order=desc&daysprune=-1
i'm chasing leaking valve cover gaskets now myself.
had you ever done anything with your leaky headgaskets, before the timing chain procedure.