oil leak at head gasket between #1 & 2

[92EcoDiesel Jetta]

Back a few months ago I did a bunch of work on my 92 Eco: New clutch, rear main seal, outer intermediate shaft bearing, most seals on the ACN tranny and for the first time the car was totally dry, not a drop of oil on the concrete driveway for months till a week ago, when the weather got cooler. I thought it was a crappy Teflon rear main seal since black diesel was dripping from the lowest point on the bell housing. I also noticed oil below the glow plugs on the block which was all wet so I washed the engine and went for a drive and saw oil coming out of the head gasket area between glow plugs 1 and 2. I did not see anymore drips from the bell housing so what was dripping there before was likely just from the head gasket making its way down there.
 
I am going to try re-torqueing the head gasket. What is the correct procedure and what's the chance of success?

[fatmobile]

Beam style wrench.
 Torque the stretch bolts until the lb ft stops rising. You can feel when they start stretching.