Interesting question Pedro. I replaced the head on my 2001 3.0 and did the standard "lash plus 3/4 turn." I did soak the lifters in oil and I assumed that setting the preload would push out oil as appropriate (having oil in the lifters would not affect preload adjustments). Of course, running the engine is when you determine if adjustment is correct. If you get valve clatter, and oil pressure is good, then you need to tighten another quarter turn. If engine runs rough, and has low vacuum, then you need to back off a quarter.
Did you have carb and intake manifold off also? If either not installed correctly then you could get low vacuum that may appear to be lifter problem.
Everything went fine with my head swap though. Good luck.
2006 Bayliner BR205
A1 Gen 2 1.47
5.0 carb engine