pushrods with or without oiling hole?

Every SB mopar engine i have seen has had solid pushrods. Well, what i mean is, solid ends fitted to hollow tubes (non-oiling). The oil, as we know is pumped up through the head to ingeniously pressurise the rocker shaft and feed the rockers and top end, with the pool of oil in the rocker arm running through that small hole to lube the rocker tip. But then i pulled apart a 1973 360 and found it had through holes in pushrods. As well, the lifters had solid discs, that is, no hole in the top of the lifter to let oil get to the pushrod anyway. I assume that engine had been rebuilt anyway, so whoever rebuilt it wasn't thinking of using these pushrods to get oil up to the rocker.

But the question is - if i use pushrods (talking ball/ball) with the oil hole and the lifters with the oil supply hole, won't this reduce oil pressure in the top end? I have noticed that most of the main brand names (Crower, Crane, Comp, Manley etc) make Mopar SB pushrods with oiling holes. But in a stock situation, with stock oilpump and stock rocker gear, will the hollow pushrods be ok to use, or have a detrimental effect on oil pressure up to the head?

thanks