oil pressure, I'm still buffaloed

Did you personaly assemble it, or did the shop do cam bearings and plugs and stuff on the block for you? It sounds like the small plug over the #5 cap was not installed. If you are turning the pump and looking down into the valley right ahead of the rpriming shaft.... is there oil pouring out there whne the pump's turning? If not, I think the plug is missing. It's a common "whoops", I've even found 2 plugs on top of each other because the original was never removed....