How much oil should my Six be leaking?

Get a set of feeler gauges and with the motor HOT AND RUNNING, slide the .010" gauge between each rocker arm and the valve.
Whoops, I told you wrong. Use the .010" gauge for the intake valves and the .020" gauge for the exhaust.

This is the order of the valves.

Exhaust
Intake

Exhaust
Intake

Exhaust
Intake

Intake
Exhaust

Intake
Exhaust

Intake
Exhaust

This list is viewed as you would view it if you were standing in front of the car. The bottom of the list is the front of the engine and the top is the back of the engine. If you're ever in doubt about the orrientation of the valves, just look at the intake and exhaust manifold. The manifold runners will correspond with the valve. IE, the intake runner will line up with the intake valve and the exhaust runner will line up with the exhaust valve.

Please anybody, do correct me if I've told him wrong. It's been awhile since I adjusted valve lash.