Excaliber,
Remove the
oil pressure sender unit, screw in a hose fitting and about 3 or 4 feet of plastic hose line. Fit a similar hose end to the cap of a quart
oil container or reasonable size funnel. Hang the container/funnel from the roof or hoist overnite with some
oil in it to drain into the motor [ The higher the better-You may have to puncture a bleed hole in the base of the container- a block drain tap fitted here would be ideal- you could go to some trouble to make a permanent one of these if you do a bit of british stuff ]
When you arrive back in the morning you should be able to see how much has gone into the pressure side of the system- now wind the motor back a couple of turns to pull some lube back into the oil pump gears to help prime the them, leave connected for another 1/2 hour, then remove and you should be good to GO!
Jac Mac