Pre-Oiling is to lubricate (create a oil film on bearings, etc.) prior to any rotation of any parts. And have instant oil pressure on crank/start up. Pulling the prop thru several times prior to starting is just wiping the last shut down oil lubrication from all bearing and lifter contact surfaces. So when starting, you just removed quite a bite of left over lubrication.
Ron,
Good place to tap in for the accumulator is the rear of the oil filter adapter next to the thermostatic valve. Some have a pressure or temp. sender there. This can be drilled out and re-tap for a #10an fitting with a ??pipe connection. Just want to make sure that the acc. Oil is going to the flow to the bearings and no off pre-lubing the oil cooler and lines. I see if I have some pics on how I did this mod.
Thomas Shpakow
www.g3ignition.com