402 BB loosing oil pressure and some pushrods dont get oil

[dwhitley167]

i just dropped a new cam in the 402, and had the heads refreshed with new springs, valves, etc. we put it back together, and it cranked right up. we went to check the pushrods to make sure they were pushin oil, and bout 3 of them wasnt pushin oil. and when we were going to dial in the timing, oil pressure was droppin, and the distributor felt like there was something loose in the bottom of it. but its a brand new cam and distributor. i was thinkin maybe oil pump goin out. any suggestions?