Rocker arm assembly alignment WTF!!!

There are 'left' and 'right' rockers, 4 of each on each side of the engine. You simply have some of them reversed. There is a left and a right in each pair of rockers on each cylinder. The ends over the valve tips slew away from each other in each pair.

Remove the shafts and re-arrange them. Also make sure that the rocker shafts are the right way; you have the oil holes pointed down (good!), but, in addition to that, the largest mounting hole on the underside of the shaft has to be over the 2nd to the rocker stand from the rear on the passenger side, and over the 2nd from the front rocker stand on the driver's side. This arrangement is how the oil gets up from the heads into the insides of the rocker shafts.