No doubt it's a must to upgrade the oil pick up. Trust me because I've learnt this the hard way after telling the "professional" when my engine got built the first time that I wanted to put in a killerB pick up after reading horror stories. According to the advice given it is not necessary and one in a few thousand fail...That's coming from a builder that supposedly does this as a profession.

That cost me a engine in the end and I happened to be one of the "thousands".
With the new engine after than it was necessary to upgrade to the killerB pick up.