pushrods with or without oiling hole?

thanks for anwers, but you have misread the question. I wanted to know if i will get an oil pressure loss by using oiling pushrods and the oiling lifter, which is how AMC, Ford etc get their oil up there. If the stock Mopar pump has to pressurise the shafts up through the head AS WELL as pump oil up through each pushrod, i would assume that the stock oil pump would have to do a bigger job.