Well...If you host one at your place, that would be in a reasonable range, and your pick of date/time as well.
+1 That would be two tech days, one on the left side for oldsmoboat & one on the right side for V&P, unless they want to meet in Nebraska.
Not only will a tech day get that & more accomplished, it also works as a great greet-n-meet session of your fellow COGGERS. This past April, Stasch(Stan Visser) hosted one at his home & we also grilled some burgers & brats turning it into a
grillin' wrenchfest! Anywho, yes, the valve adjustment
LOOKS a little intimidating the first time, but is very straightforward & can be done without all those "special" tools don't forget. It's screw & locknut for the adjustments. I allowed 4-6 hrs. for the 1st time.
Just be methodical, take pics & notes, that way you can also use that as a tool for future valve adjustments to see if/how they're wearing. Plus, you can inspect the camshafts for excessive pitting.