Purty good, I got a bs in mechanical engineering, and keep all of the farm machinery running. I haven't rebuilt an engine yet, and I hate tracking down electrical problems. I don't have much fear when it comes to tearing into things.
I was just wondering how much time to plan on, I hate to leave things torn apart.
I can only offer you my own expereince...I have a 400 manual and with a set of $7 feeler gauges from NAPA and about 2hrs of my time (including removing the plastic), I had my valve lash correctly adjusted.
For what it is worth, my dealer charges 1hr labour for the job. Obviously, I am slower than his mechanic.