Stay away from the 'Godzilla' 7.3 gasser. They are having continuing issues with the heads and camshafts. The heads are blowing out spark plugs and the cam shafts are not heat treated properly (I know who is doing the heat treat btw) and the cam lobes are disintegrating and spewing metal parts all over inside the engines, which cause a complete rebuild under warranty.
This is just false. I am very active on Ford-Trucks.com, and outside a few early 2020 7.3’s in RVs, there are virtually no issues with the heads or cam.