Rocker Arm/Valve Adjustment

["Mark Martin" <markmartin@adelphia.net>]

I just completed the adjustment of the Rocker Arms as I get ready for the
spring.  My question (though it may be silly) deals with a statement in the
Haynes Owner Workshop manual stating "An alternative method is to set the
gaps with the engine running, and although this may be faster it is no more
reliable" (page 43, paragraph 59.9).

I've never adjusted the rockers with the engine running.  Can anyone explain
to me how to actually do this and what the pros/cons are?

Thanks,

Mark
'72 TR6