Stop in for a cup of coffee

Good Morning Everyone. I got the shift linkage sorted out - I think. Seems to shift into all gears now, including park. Also, just looped the cooler lines as the prebent ones from Classic Industries wont be here until Monday. Will fill with fluid, water in radiator and oil in engine. Speaking of engine oil, what is the best way to pull the oil pump drive gear? I will pull the distributor for priming the oil system, but what is the best method to remove the gear and get it back where it was for timing? Also, the hex to spin the oil pump is 5/16", I believe. Anyone know for sure? It is a 440. Thanks to all and have a great morning.