And contrary to what you might be told, the rule of 9 does work with that engine.
Starting with front of the engine (radiator end) you number the valves along the head, 1 to 8. If valve 3 is down and the rocker is rocking, you check the clearance on valve 6 (total = 9). And so on.
The action of re-torquing head bolts is something that is needed only with some head gaskets. Often at 500 miles from first run. Unnecessary and not a good idea to do it at other times as corrosion will often mean the tightness after redoing them is not as even as it was before!
