I doubt it. Stock rocker shafts or roller rockers? From the factory ive seen stock engines with .050 of preload.
You don't want to bottom out the plunger in the lifter. You would have big problems. For piece of mind I would definetly check it.
If you want to know for sure I have a adjustable pushrod you can use if you want to. I could mail it out. As long as I get it back