I`m sure this has been brought up before but I can`t find it. I have a 292 chev with a hydraulic cam . the book sez zero lash with no preload.How much ,if any, preload do you guys use?

I go 1/2 turn for preload. Modern lifters require less than old OEM lifters.

Thanks,could`nt ask for input from a more knowledgable person