[Jake Raby]

Post some pics of where the notches are in both banks. Lock the crank at TDC when taking the photos. This is a somewhat common issue and has several contributing factors, some simple, some huge.
Worst case you can ship it this way and we can find why the timing moved. Don't just reset the timing, the issue is screaming that an underlying problem exists and it will find you if you don't find it first.