This valve adjust job is a bit of a pain but your engine diserves to be happy! Here's my method:
Get the motor warm, 20 minutes of running, install a cut down an old valve cover to stop the bleading, with motor running tweak the adjustment screw just until noise just goes away then recheck specs with feeler gauge. To fine tune the things I like to use an open end wrench till I'm done then recheck with a box end. Do that 12 times and have a beer. Oh yeah, better to be on the loose side if poss. so you wont burn any valves.
