Wes Adams’ approach of using sleeves on a run of the mill FE block was documented back in 2006/7. It does help if you’re related to the machinist, sleeves don’t come cheap.
These articles are also very useful for general information on the assembly of a FE.
Wes Adams is the force behind the Poor Mans 427. His info on this project is posted on the FordFE forum. Thanks to him for all his work and information. It may take a little digging to get all the details but they’re out there.
BEWARE! When it comes time to sell, the magic words are “Side-Oiler“. The cubic inches may be 427 or larger, the block may be an FE but if it isn’t a Side-Oiler, buyers tend to turn up their nose, especially on a higher-end car. Practically, it doesn’t matter but the reality is “perceptions matter!”