best way of setting roller lifters ??

Here is the Hughes instruction sheet.

http://www.hughesengines.com/Upload/productInstructions/camshaft_instructions_Mar_2016.pdf

Notice that they do NOT give an X amount to turn the rocker adjusters, but they do give a preload amount. They also say as we all (should) know that high performance valve trains are more noisy than stock.

There is one spot in there where they talk about Magnum rollers and say they need about two turns. That's the only place I saw a reference to the number of turns....although I did not read every word.