Sweet deal, I got mine for free with a trailer, I just got the parts which include the head gasket and exhaust gaskets from SBT. Also SBT has a forum on there site thats pretty busy and PWCtoday has lots of activity on their forum as well. I'm a member on them all, also I will keep everyone posted on my status to return this 640 to shipshape. Laterz good luck,
dirtyhands