coolant leaking into oil on 6.4

[Dan c]

I just got done with a complete engine rebuild and now it is leaking very large amounts of coolant into the engine oil , today i pulled the oil pan off to see where it could be leaking from and near as i can tell it is dripping off the main bearing caps, but cant see much more where it could be coming from. I have replaced the front cover , oil cooler, both heads (reman ford) and installed ARP head studs. if anybody has any ideas where it could be coming from please fell free to post i am open to all suggestions. Thanks