The 216 is regulated by the oil distributor on the side of the engine block to 14psi. (nothing to do with the pump). Maybe you are referring to the 261 full flow system? That is 30 and the stock filtration system has the oil filter placed just after the pump? The Spec has the rpm raise and lower number at 1650 rpm. In other words, the relief valve operates after that to regulate the pressure. If the engine is tight, that number is much lower.
