You don't have to pull the distributor. Just remove the power to the coil and then crank the engine until oil pressure is achieved, then replace power to coil and start.
im shocked no one has noticed the lack of maste cyl resevoir cover.

Is there a reason to worry about this at all? I thought priming was to get oil into the galleys of a newly rebuilt engine, not about the oil pump.
Any difference between this and letting your engine sit for weeks then starting it? Pump is just a bit above the level of the pickup (right?) which means it should be submerged in oil anyways.