Quote Originally Posted by Sinister
Here's some ideas,

First: there are little clips you can buy at the autoparts that will clip on the rocker arms and plug the oil hole, allowing you to adj. rocker arms without spraying oil everywhere.

Second: The way I have always adj. hydraulic lifters is ; bring the cylinder to TDC on compression stroke,{both lifters should now be on the base circle of the cam}, tighten down the rocker while turning the pushrod between thumb and forefinger until you start to feel drag. Then go 1/2 turn past that and you're done. Move to the next cylinder and repeat.

I've only built a few engines, but it has always worked fine for me.

Just my 2 cents
If you go another half a turn past feeling drag then you have exceeded the .020 to .060 pre-load.