I like Shaun, I used AED for years, he needs to flip the block over, he kept it upside down so we can’t see if the extra oil galleys, etc are in there.
Differences shown by livernois at 4:50, they even say same casting number carried over
The one part that I really wonder about is the deconstructed Livernois F150 Gen 4 head has a multi-layer design where the upper portion holds the cam vs. the single layer in the AED version from the DH.
The F150 and mustang designs have diverged and share very few parts. The 24 mustang definitely has way more in common with the 23 than it does with the 21+F150. AED released another video showing the block and head gasket part numbers and confirmed they are the same since 2018.