As long as you can't hang your fingernail on the wear spot your all right. Just start at one side of your shaft and start pulling off the pieces, lay them on at table in the order they came off, now take and reverse every pair of rockers than reassemble in the order you took them off. When you go to bolt the shaft assem. back on, tighten each bolt down a little at a time. You want to draw the shaft down tight equally. Do the same to the other side. Oh and as you tighten the bolts make sure the push rods are in the rocker arm sockets.