If you have the factory pushrods that came with these shafts they are for solid lifters so you will have to buy pushrods anyway to fit hydraulics. Ball ended rods are much cheaper than ball and cup type. Hot Rod did a lifter comparison recently on a big block mopar and there wasn't a spits worth of difference adjusted barely off the bottom of lifter travel vs barely off the top. Depending on how much you mill the heads there may be no issues.