There is a tool called clickadjust. It is made by the same company that invented the colortune glas spark plugs.

Setting valves it`s a peace of cake with this tool.

It is verry popular here in europe, but I´m sure
they sell it in the US too.

click here for a discription

[img]http://mgaguru.com/mgtech/tools/pics/clickadjust.gif[/img]