GM 5.7L motor valve calibration

Good afternoon:

I wanted to know if someone has a manual of this engine model since we have it as a stationary engine and we do not have any type of information, it is the same engine that Chevrolet Silverado or Cheyenne V8 5.7 L.

What Nesecito promptly is the measure to calibrate the admission and escape valves of these engines.

Thanks in advance for your comments