Stuart will probably know better than I, but I don't recall there being anything tricky about it. Nothin' a few box wrenches can't handle. Just keep track of everything - maybe snap a few photos of the whole she-bang before you tear it apart. I seem to recall that there are R. Hand and L. Hand rockers, for both intake and exhaust. Keep the order straight. Common wisdom is that the rockers should stay mated with their respective push rods, so best not to change the order (I've never quite understood this: if you're going to re-adjust the valve lash anyway, who cares if the rockers are mated to different push-rods?)
Worst part is probably having to adjust the valves on re-assembly!
-Michael
