Re: Finished motor rebuild. Pics
Leave the fuel disconnected, remove the plugs and crank it for a minute to get the oil through the system. Most motors as Mark had mentioned you can remove the distributer and use a spare shaft (if you have one) to turn the oil pump.
Additionally, people used to put vasaline in the oil pump before assembly completion.
You just want to make sure everything is properly coated for the first start.