Well it sounds like the subject has covered from all angles, and although this is a stovebolt engine being covered,1962 235, it applies to any other rebuilt motor as well.
Remember that the drill will be lucky to pull even 200 RPM under full load with a normal pump, let alone a high volume one.
That is if it doesn't burn the brushes up in smoke while trying!
The point is to get the oil moving through the galleries in the engine before start up, NOT to actually build up pressure.
A few drips off the end of a rocker arm tell you that the oil has made its way to the top of the engine, and therefore should be O.K. to fire up!
Another way to achieve this is to simply leave the spark plugs out of the engine, wind the tension off the rocker arm posts/springs and then simply crank the motor over on the battery.This will ensure a good coating of oil before any strain is applied to any of the parts.
