MLS head gasket failure?

[Moosie]

I just rebuilt my 420a and went to change the oil at the 500 mile mark, and noticed oil leaking from the head gasket at the back of the engine from around the oil return holes I am guessing. I used a MLS gasket ,had my head and block resurfaced, torqued everything to spec. I am now kind of discouraged that this happened and don't understand why..Has anyone else had this problem and if you did , how did you resolve it?

 

[AOsipower]

Did you try retorquing the head bolts? Do you have a quality torque wrench? Did you do the work or did a shop?