oil comming from header gasket

[PhaLenx]

Sup fellas ,long time viewer, 1st post.I have a 92 240sx, (RPS13)/USDM180sx, W/ KA24DE twin cam 16 valve.I recently pulled the head to replace it due to some cam shaft guide bolts broken off in old head from original BC stage 2 cam install (brother confused torque spec). I took the new head to my local machine shop to have it machined,valves seated, valve seals installed, port polish and 3 angle valve job done. well, after assembly when i rotated motor for the first time i noticed oil comming out from around the header gasket. Note there is no coolant in oil, nor does the block leak any coolant. any suggestions?additional info:1. used all new parts in head :valves,spring spring seats,valve seals, retainers and cotters,valve cover gasket, and a 3 layer metal Cometic head gasket, APR head studs, and all new gaskets else where on the front of the motor.

I can post pictures (tear down and assembly was documented high res)