Head gasket problems are more associated with the diesel engines. Diesels have one less head bolt than the gas and have much higher compression.
In addition to making sure the head and block surfaces are true you also need to watch the sleeve protrusion from the top of the block. If I remember correctly the specification is for between 0.0 and .005 thousands above the block deck surface. Also you need to make sure there is no more that .002 difference between any two adjacent sleeves.
If you need to have the block deck resurfaced you also need to have the sleeve recesses remachined to get the sleeve protrusion correct.
I did have one 560 gas that I worked on where block deck and sleeve heights were bad but otherwise was in good shape. I was able to have the machine shop redeck the block without disassembling the lower end. They just machined the sleeves along with the block. If it ever needs to have new sleeves put in it in the future the sleeve recesses will have to be redone. It was sold on an auction about 15 years later so I don't know where that one ended up.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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