Need advice on Oil Pump

Thanks all you guys for the advice. One of my concerns when engine was running was that oil pressure was low. During tear down I didn't find any real problems where oil was losing pressure unless it was cam bearings. Hopefully with all new bearings and rings oil loss will not be problem. I will pressurize with drill after assembly so can check out before installing engine. I will exchange HV for standard pump. Also good ideas to check pan fit and use HD shaft. Thanks a lot.