Mmmmmm.... hold just a moment. one of the things to consider is the oil pump gear. It is driven directly off of a mating gear on the camshaft; this gear is a weak point in the system, known to fail from time to time, and some cams have been known to be hard on the pump gear. If it goes, then there goes your oil pressure, and there goes your engine unless you catch it immediately.
IIRC, Comp is one of the cams that may have been problematic in this regard; maybe someone else can confirm/deny this; or go onto slantsix.org to read up more on this. Again, just IIRC, it is in the cam blanks used. It seems like Oregon has the 'formula' for this aspect of the /6 cams.
This article discusses the oil pump gear work by Doug Dutra in detail, and mentions the cam gear in the latter half of the article.
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