Do I NEED to prime it?

I am hoping to have my motor running tomorrow for the first time in about a year and a half. It was broke in on a dyno so I’m not too worried about the typical first fire up stuff. However I am concerned about how long it’s been sitting. I would like to prime the oil pump but I do not have the tool needed. Would I be safe just disconnecting the fuel and turning it over until it builds oil pressure or should I force myself to wait?