Sorry to hear this. That is definitely a bummer. I had some similar issues with a project this year and it is a bit of a set back. But, at least all the fab is done and it really looks great in there. I'm not familiar with these engines, but do any oil feed ports go through the block to the head using the head gasket to seal it? On 5.9 cummins it's that way and if the head gasket blows out near the oil feed passage you get oil blowing out the side. Could it be a bad valve seal or seals as well? Hopefully you'll get lucky and it'll be something simple! Good luck sir!