Bent Pushrods on a rebuilt 318

With the shafts upside down, the rocker system is starved. Of the 5 mounting holes along the bottom of the shaft, the 2nd and 4th mounting holes are larger than the rest to let oil come up through the 2nd pedestal from the left on each head and go into the center of the shaft. All of the mounting holes on the top are just barely large enough for the rocker studs, and with the shafts upside down, those small holes cut off most of the oil flow into the rocker shafts. You can see no oil coming from the forward 3 pairs of rocker shafts holes; there should be a dribble from each one.

The idea of something seizing due to lack of oil, like the exhaust guides as suggested above, sure seems like a good possibility.