Just to finish it out. And to make sure I have it right chime in....
The cam bearings and main bearings (and really everything is in parallel from the galleries). Most of the oil goes to the main bearings I would say. The oil will take the path of least resistance back to the sump. The oil pump is suppose to flow enough oil and bearing clearances have tolerances to sorta choke the flow at the bearings so everywhere maintains some pressurized flow.
At the main bearings it is also pumped into the crankshaft (the bearings have grooves that make passages connect) and ported through the crankshaft to the big end of rods. Later blocks have sprayers in the main caps (main web/saddle) to spray on piston. The small end of rods are press fit to wristpin and don't move relative so no lubrication required. The piston wrist pin bore is lubed via spray and or splash lubrication. I would say most oil spray is being spun off the crank that has oozed out of the main bearings and rod bearings. Oil spray and/or splash also cools the underneath of the piston crown and skirt. Spray, slung off, and/or splash wets the outside of piston skirt and lubes the cylinder and rings. The bottom ring scrapes the excess oil back down the bore to sling it back towards the crank and sump.
The pushrods spits /squirts a little drop of oil each pump of lifter to lightly rain over the valve train.
I am not sure about the front timing gears. I think most of their lube is from oil coming out of front side of cam and crank bearings then getting slung around by centrifugal forces??????
