1987 Pontiac Sunbird Compression Problems

My car has slowly been leaking oil from the bottom passenger side of the engine after running (while idling almost no oil leaks) and had a slight tick(thought it was a stuck lifter but hadnt checked it out I have had this car only 10 days). After a hour long trip directly into 55+MPH winds the car stalled out when the speed reduced. It would not start so I had it towed home. I checked and have spark and fuel so I performed a dry compression test and got readings of 70-60-60-40. The top half of my engine is virtually spotless, with no oil or other fluids. Now my question is this:
Is this most likely my head gasket?
Or is it the piston rings?
and should I not waste my time?