Can’t get Harland sharp rockers to fit on head?

some of the valves are going to be open or trying to open,it is not going to seat on the heads.if you back off the rocker shaft bolts on the other side it's going to look the same way.I would back the adjuster off 2 turns,tighten the shaft a little at a time working it down evenly making sure the pushrods line up to rockers as you go.Once the shafts is torqued down reset lash on rockers.