CNC-Dude (and Tom):

Have you considered doing a "walk through" with the dyno call team of a representative head and cam change (say) a week prior to the actual event? Doing so will point up some of those "gotchas" that you'd like to avoid at $50/hour. You know the old saying: "the devil is in the details" so it's likely it will be the small things that will be the cause of any trouble you encounter. You'll also get a feel for what kind of time you can expect to perform the typical component swap(s) and that should be valuable when planning the test schedule. Finally, you may see additional or further ways you can "pre-assemble" some of the swap components (beyond those you've already discussed in this thread) to help save some time.

Of course, Murphy's Law (and its corollaries) will be in effect:

1) Everything that can go wrong, will go wrong.
2) Nothing is as simple as it seems.
3) Everything takes longer than it should.

It would be nice if Murphy had some prior engagement and couldn't attend the dyno session. With all the hard work and planning your team is doing, I'm guessing #1 above will be avoided. But #2 and #3, that's a different story . . .

In any event, you guys are doing an outstanding job and I can't wait to see the outcome of all the hard work, great ideas and contributions that have gone into this project.