Assuming you start with a Helms manual, and you never adjusted the valves before, and you have all the necessary tools, how long would it take to do this?

I read the tech-note found on the DIY forum, and I'm not sure this is something I want to do: oil change, tranny oil change, 9005 conversion, no problem. Timing belt/water pump, no way.

So would adjusting valves fall in the "no problem" or the "no way" column?