I have several Waukesha 6WAKH cylinder heads for sale.  These came off the shelf of a mining and road construction contractor years ago.  I believe they were rebuilt at that time and were shelved ready for use.  The number cast in the one head I checked is 123002C.  I can check the other ones if someone is interested. I believe I have head gaskets for these heads too.   Also have the exhaust manifolds that I believe fit these heads.  I one manifold has Waukesha and has the numbers CHG191?? and 96044A cast into it.  The other says Hessleman and has the numbers CHG19140 and 96043A cast into it.  These manifolds were welded but looks like a professional job and are ready for use.  Can send pictures if there is any interest.  Email Keith at tiredtruck@Verizon.net