I've tuned for both MAP(with MAF disabled) and MAF(400 RPM up) and the truck runs good either way. In fact I really cant tell any difference between the two.

So, why not run completely using MAF or MAP? Why mix the 2 or run the MAF from 4000RPM up?

Could you zero out VE table, set MAF at 0 RPM and run entirely using the MAF?

Just curious