What's the book and actual time for a head-gasket? I did everything including flushing the radiator 3-times with citric-acid, replacing the oil-pressure sending unit, and replacing the fuel-pressure regulator in 26-hours.

I sent the head out to install new valve guides via the chill & heat method, and had them re-surface/grind/cut the valve seats where needed, and install new valve-stem seals for $350.

:-) neil