Oil leak from between head and block

Yesterday I retorqued the intake bolts, were able to torque another 1/4 of a turn. Started the engine and had it running for a couple of minutes while inspecting the area where it´s leaking from with a mirror, but to no avail. It still leaks
Tonight I pulled the head.
While unbolting it I figured that I would test to have the bolts retorqued to 70 ft/p. With the head bolts under the valve cover I was able to turn the wrench a half of a 1/4 of a turn.
Testing, I would say they were torqued to ~67 ft/p. How much of a difference would this make?
I´m going to clean the head and gasket tomorrow and check for the straightness of the head.