Yes definitely shorter pushrods. The standards don't fit even with adjuster screw fully wound up.
Non-member. Sorry, I'm not sure I agree. From everything I've read. Valve side geometry (assuming no change to rocker shape) is determined by the length of the valve stem and the hight of the centre of rotation of the shaft. Changing the length of pushrods would only serve to alter the length of the adjustment screw as valve as ore determined valve lash is fixed. Therefore set head thickness (skim), set valve side geometry then add pushrod of correct length to give correct valve lash.