Btw, I did just run across this in some old online records:

http://chevy.oldcarmanualproject.com/models/engine.htm

Not much of it applies to mine. Perhaps others will glean some details about their own (US) power plants.

Fyi, my truck was a kind of rebuild by a previous owner.
He had it reregistered with a new VIN (after it was towed to Canada after being mostly toasted in a fire in New Mexico).
So the VIN is non-relavent, and so very few parts are original on this vehicle (ie, matching numbers, etc).