I was the one that mentioned it... just make sure your plugs are out so you dont build any compression (easier to turn over and no load on the bearings with no compression). I used a good sized drill connected to a hacked up extension holding the socket. Be sure you put the oil sender back in before you do this to avoid spewing oil all over your new motor like I did
You will be able to feel the moment your bearings get any oil pressure but keep spinning it with the drill for another 30-40 sec to get the oil up to the cam bearings. You are going to need to use a drill for sure since spinning it by hand wont get you enough speed to pump oil. If you want to fill the oil pump from the back side just pull the oil sender and fill that hole it screwes into slowly. That hole will route oil into the back side of the pump where the actual pump gears are.