What's wrong with my motor?

a person asked if cam bearings are in correct position. old ones and a cam problem can twist cam bearings . and any u try cam and lifters will not oil. ck means take apart and look. cam bearings r the last as a suspect. u build any motor I me I do it correctly. cam bearings positioned correctly. may shave bearings to make loose don't shave if u don't know how a track race thing. but ck oil holes on cam bearings . point a raced motor twistes cam bearings can slide off oil holes. ck then go oil pump.