Oil pump priming question

Do you have anyone that can rotate the engine by the balancer bolt while you run the priming drill?

Also, did anyone mention the "cup" plug that's installed in the passage under the main cap, part way towards the top where the oil pressure fitting goes? It bottoms out part way between the two. You might be able to figure out if it's there by dropping a long thin rod down the pressure fitting hole by the distributor. It shouldn't reach the main cap.