Get a basic manual - even a Chiltons type and it should give you the directions you need. In REALLY Basic terms, you turn the engine over to a timing mark and then set certain exhaust valves and intake valves on certain cylinders, then turn it 180 degrees and do the rest. You tighten the adjusters just to the point of no looseness (lash) and then an extra 1/2 to 1 turn. It is not all that complicated but you do need to do it right. It has been years since I did it but don't remember having any real problem with it. Depending on engine condition, it might be a good time to change valve seals. That was how I ended up doing my Suburban. It was blowing blue smoke on startup. Changed the seals and it ran much better but had to adjust all of the valves as a result. Have been thinking about checking the old pickup engine but have not done it yet. I think I need some new lifters.
