Intake gasket leak?

If you set the intake on the heads without a gasket the bolt holes in the manifold should be 1/2 a hole lower than the bolt holes in the head.

If the holes line up you need to mill the face of the intake manifold the thickness of the gasket plus a clean up cut to start.
I'll have another look but I think the holes line up with no gasket. I don't believe the shop milled the heads much but they may have been cut before.