Further to the above (which is good to hear as I own a tenth of the engine which eharding and TheGorilla are talking about), even pulling through the engine with care can help prolong it's life.
Hopefully you have the manifold drain modification but if the engine has been standing for some time (think days or longer) and there is some resistance to pulling through the blades, don't just pull harder. The chances are there is a significant amount of oil in the lower cylinders which may require removing the cowling and lower plugs. Also, although you are supposed to pull the blades through nine times, I always pull it through ten (I have ten fingers - even I remember that), which means if I miss one, I've still pulled it through nine.
As mentioned, the Skytrace website is the best source of info (followed by Widebody).