Looks like it could be the head gasket. Check the intake manifold too. It could be leaking from the im and running down to there. I had a 97 Chevy pickup with the Vortec 5.7L engine. The intake manifold leaked at the right front corner, and ran down and was dripping off the back corner of the head. At first I thought it was a head gasket, until the leak got a little worse and was more obvious where it was leaking from. Good luck, hope it's not the head gasket.