im getting ready to pull the head on this 216 which has a bent push rod...broken rocker and stuck valve......all i have to do is to unscrew the nuts on top of the rockers to remove the rockers......do i have to unscrew the rocker set bolts that are on the drivers side of the rockers........and when i re-install it all i have to do is drop the rockers back over the bolts and tighten them down.........and because the rocker setscrews are already adjusted just start it up and fine tune it.........is the setscrew on each rocker the only adjustment point for the lifters and valves? ........this rocker system different from late model 6 cycliders like a 250 chevy......opening up the can of worms........shame i cant post pictures here.......you should see number 4 intake port.....sludge...i think the pushrods been bent for a long time..........thanks everyone for your help.......