I do it this way.... pull all the adjusters completely out of the rockers.....torque the shaft assemblies to spec on the head...drop the pushrods THROUGH the still-open adjuster holes into the lifter cups....replace as many adjusters as possible, rotate the engine to get the ones that were at max lift in, then re-adjust either lash or preload.

I don't know of a way to do it without re-adjusting.