Paul, just a recommendation as you get closer.
Maybe just get to know the truck if it's running decent now. The weather is changing, fuel mix is changing, the engine will be breaking in. All these things combined with looking at a/f numbers will have you chasing your tail.
FWIW, I don't even use an AF meter in a carbed vehicle, except for on a chassis dyno to make sure we aren't too lean during the first couple of pulls. What I do is drive and pay attention to when it's doing something wrong, but you need to get to know your new motor now
Some rules of thumb though
1 - ignore idle a/f numbers and get it so it idles the best at the RPM you want
2 - if you want to do a WOT full-load pull, log it if possible, but if not have a passenger pay attention, 12.5:1 is likely pretty good, but it has to be a constant load and stay at WOT so the PV and the mains are both feeding the boosters. Remember, you are evaluating both primary and secondary. I generally add to the secondary to save a little mileage
Everything else, let the engine tell you. If it surges at part throttle, go with an earlier PV, if it doesn't, leave it alone.
I'd say in general, other than the run on, which will likely cure itself as it loosens up, get as many miles on it as you can, get a few oil changes under your belt, as the idle creeps up and you readjust it and idle a/f, take notes and see where you end up before you go back inside.
Now in my EFI builds, I can log load, vacuum, timing, a/f, different story because I can see everything that my foot tried to do and how the car reacted, but a/f ratio alone is a bit harder without the added info you will get from getting to know the behavior of the truck